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Is this legal? Seems a bit like unregulated gambling?
While it is legal (for the time being) it is highly unregulated. Money laundering is the first thing I thought of when learned about the bitcoin, which, ironically is one of the excuses the government used to crack down on online gambling recently.
Bitcoin seems to be overwhelmingly the domain of currency speculators, who aren't really doing anything useful. More effort should be put into promoting it as a working currency to exchange actual goods and services of value.
it beat google wallet to the punch, you can send bitcoins in person via android
Haven't you heard of the Silk Road? ;P
Oh good, it's been a while since bitcoin made the front page.
Just wait for a YC S13 startup announcement for some kind of bitcoin wallet developer tool or optimized way to spend bitcoins on mobile devices... :)
it was done about 2 months ago on android
you'd be surprised at how close to reality that idea is
I haven't gotten into bitcoins, much less bitcoin options, but if I were looking to use options on bitcoins I'd first need to see some numbers regarding liquidity -- daily and average volume, open interest, etc.
Most of the volume is in MtGox. Currently $668K today, $12.25M last 30 days.

http://bitcoincharts.com/markets/

You'd also have to have a liquid options market, and counterparties you can trust to complete the trade when you exercise an option.
Neat. Hopefully serious. I bought one put as a test.
I applaud people in the BTC community for developing more advanced financial instruments, but implementing them like this is so 1994. There's no way this is scalable. Every order is hand processed via email. Maybe I'm just spoiled, but check out the order fulfillment instructions you get after clicking through for a purchase:

In order to buy 1 PUT @26.5 contracts expiring month after next at 27.74233656 each please send exactly: 3.18764653BTC

at the address 1JPvucRfu3ZzEvfBUQTJwsxMrZjeTqD6zR

You must send an email to office-at-polimedia.us BEFORE sending bitcoins, containing the amount quoted above and the bitcoin address you are seding from. Optionally you can also include the address you want proceeds forwarded to. If you do not do this it may not be possible to prove ownership later on!

READ CAREFULLY! to understand how this works :

- The amount you actually owe has been rounded up at the 5th decimal place. The last three decimal places are used to signal the order, as follows : the sixth carries the option type and maturity (calls this month 1, next 2, after next 3 then puts 4, 5 and 6) ; the seventh and eigth carry the strike. [Is that a hack or is that a hack? I have a visceral distaste for loss of precision, even where it may not be obviously needed.]

- The amount itself encodes the quantity bought. You will be credited as many whole contracts as can be purchased by your order at the time of processing. I will do my best to process imediately, but due to the somewhat imprecise timing of the bitcoin transactions (by block rather than by timestamp) there may appear slight delays. [manual order processing?]

- Once your transaction has been accepted and processed, you will receive change, for the fraction of contract that could not be bought, as well as for the sums added as explained above for clerical reasons. The sending of this change is the confirmation of your purchase. In general a confirmation should show up within the hour. However, since I am currently handchecking all transactions to make sure things run smoothly, this may be delayed. Even in case of delay, you can rest assured that your order will be processed only with quotes valid for your block.

- Options will not be quoted on the last day of their month (so no quotes after the last minute of the last Thursday of each month for options expiring that month). This means the last you can sell any options is late night Thursday. Times are the same as bitcoincharts use, so make sure you account for that.

- All options positions not closed by the first minute of last Friday in their last month will be automatically exercised, at the weighted average price of the day as published by bitcoincharts. This means that options out of the money will be discarded. Options in the money will have their value converted to BTC at the conversion rate then current. The amount of BTC thus obtained will be sent before the following Monday (so until the last minute of Sunday) to the address that originally bought the contract. The reason to do it this way is that I do not think the market is liquid enough for spot prices to be fair, and since I'm using Friday average price I can't trade on Friday.

- I reserve the right to refuse any transactions for any reason (including excess risk load on the book, order too large to effectively hedge etc) or for no reason whatsoever. All refused transactions will be refunded within 48 hours.

- You are not required to use this page, if you'd rather hack the orders directly by the recipe explained above that's fine. However be aware that uninterpretable orders will be treated as donations. You will not get a refund. VERY IMPORTANT : bitcoin before v0.3.21-beta rounds automatically to 0.01. DO NOT USE IT OR YOU WILL LOSE YOUR MONEY. Bitcoin v 0.3.24-beta correctly sends all 8 decimals.

- Please keep all orders over 0.1 BTC. If you send less than that it will be simply treated as a donation. You will not get a refund. This only applies to BTC you actually send to open...