Ask HN: Image upload service

I've build a Blogger client for Android and it's gaining some interesting traction. Suddently Google Picasa service went down and my users aren't happy with it.

Does any one know an equivalent service ? Just want to upload picture's and get a url to embed on posts, straight from Android.

As this is a freemium app, it would be nice if the cost is low. Currently users were upload 1.2k photos per day and it will increase with time.

Any recommendation ?