Also Palm apps make MUCH more effecient use of RAM. For strictly business purposes, it's great. Add-ins like Docs to Go are better apps than the Pocket Word and Excel apps in PPB imho.
With that being said, I switched from Palm OS to PPC last October and would not go back! I mean ... I use mine for business contact mgt; note taking; tracking business expenses; gps nav; mp3; encoded dvd viewing; wireless internet; games; pictures; lists; etc. Also, batteries are easily replaceable - not built-in like palm.
Now if someone would only write a tweak to move the scroll bar to the left side for us wrong-handers!! This is the ONLY thing I could do on my Palm that I can't on PPC.