I have to join the people asking for iPhone support. I've been an ardent Palm user for a decade now, but the fact of the matter is, (and sad as it is), Palm is dead, and at least for now, iPhone is a lot more valid as a format.
Fingers crossed you guys can get an iPhone version of APDL and Logbook Pro out ASAP, so we don't have to go to other softwares.
Cheers,
Addy