Also see:
Designing applications for the iPad
“Collection of some articles and postings that provide intriguing insights on some of the possibilities and limitations of designing apps for the upcoming iPad. Luke Wroblewski in particular has captured an extensive set of design resources on his blog, which I highly recommend! Bill Scott has also catalogued an array of nifty interactions that were showcased in the original iPad keynote video, also highly rec.
>> iPad Design Tools and Resources by Luke Wroblewski
>> iPad Application Design by Matt Legend Gemmell
>> New Multitouch Interactions in the iPad by Luke Wroblewski
>> iPad UX Interactions (Interesting Moments) by Bill Scott