[habosa]

This. The idea is so good I was ready to "drop everything and do it" but I can smell from the post that 37s is about to release the service they're asking for and would blow me out of the water.

[karterk]

Not really. Their last product (sortfolio) did not really do that well:

http://37signals.com/svn/posts/3196-sortfolio-lives

They do have a good reach and that will definitely help them, but the tablet market is now big enough for multiple players.