I'm with Gary, this would be a great addition. I'll be happy to wait until 2.1 but it would really be a nice feature for my current app, so if you could shoe-horn it into 2.0 that would be nice (but I know 2.0 is almost overdue...).
All my iOS apps are iPad-based and the more iPad-centric features I can easily implement the better. What I like about your custom cell implementation as well is that it lets me make creative use of the large iPad screen. I can put an entire full-screen, IB-laid-out, multifunction form in a single cell, binding with one line of code. Yikes.