The PDAP profile is a profile especially for PDAs. MIIDP 2.0 is a different profile. PDAP is a superset of MIDP, so all existing MIDP applications should run on PDAP as well. You can find the public specification draft at
http://jcp.org/aboutJava/communityprocess/review/jsr075/index.html I think it will be presented at a more popular place on the SUN homepage as soon as a reference implementation is available.
Best,
Stefan