I love basecamp and use it daily. It is a beautiful software. However, I find it hard to believe that Jason F and DHH don't think they can come up with an idea that is more brilliant than a PM system.
Something that scales, inexpensive, and with out the hassles of system admin that is required with ec2, slicehost, rackspace cloud, and other cloud sites.
I think should be as simple as possible. http://dealbk.com let users get coupons via a smartphone, sms, and printed with a map. Whatever method that is easiest for the consumer will win.
We have been kind of low key about this project within the tech world, choosing to launch slowly to local interests in our city. We launched to Austin, TX on Feb 15th. The mobile site is at http://dealbk.com/m or you can browse to dealbk.com on a smartphone. HN community is important to me so any feedback is appreciated.