i also have a palm T5 and a N800. I need to sync with Outlook (work calendar + contacts) and for some time i kept the palm because the N800 does not sync with outlook. However later i got a N76 (3G pphone) and i now use the N76 as PIM with sync with outlook (calendar,contacts, nootes) and i droped the Palm. The N76 is a good compliment to N800, and with bluetooth the two work well together. I use GPE PIM on N800 for personal agenda and sync with Google.

i use PasswordSafe on N800 to replace eWallet i had in the Palm. I just hope in the future OS2008 will suport Nokia N Series PC Suite and QuickOffice (these 2 applications were key for me to replace Palm by N76).