I use Palm Desktop on both the office computer and the PDA. I believe that you can have more than one user, but don't know if it would show multiple users on the same calendar. I thought that Outlook was supposed to be able to show everyones meeting and time out of the office.
The search function is pretty good, but has a few quirks, like if you are showing customers and search for a supplier the search will come back empty.
Go to
www.handango.com for time tracking software for use on PDA type devices.