Jason,
Here is the software I use with my Palm and which I find invaluble:
1) Microsoft Outlook - Everything that is on my contact manager is synced to my palm. Tasks, Calender, Notes, Email, etc.
2) Documents To GO - This allow Microsoft Word and Excel files to be synced to my palm.
3) Tons of freeware and shareware programs out there. I love the Home Loan program for pre-qualifying.
It wont be long before MLS's will have WAP technology and we can access the database with cell phones. That would eliminate the need for the Pocket Real Estate program. If I need to access the MLS I use my laptop and wireless connection.
I am presently researching a good combination cell/pda that has the capabilities that I have now on my PDA.