MetaLab Launches Flow, A Beautiful Tool For Task Management (techcrunch.com)

http://www.getflow.com/ The service is $9.99 a month and they offer a web client, free iPhone and iPad app, theres a beta app for mac os x also.

Very nice design but how does this differentiate itself from Google to do widget?

It appears pretty complex from the screenshots but after giving it a spin its really quite a compelling offering. It may just open my wallet too.

More discussion here:

http://news.ycombinator.com/item?id=2356194

Wunderlist has a similar design to Things as has Flow. WunderList does crossplatform too using Titanium.