Is there an easy way to do this without using a third party server? Here is my setup:

PC = Outlook 2000, XP Home
Laptop = Outlook 2003, XP pro
BB = 7100r

Any advice is greatly appreciated.

Without a BES, all you can really do is sync to both desktop and laptop separately.

Make sure that you have conflict resolutions set to handheld wins on your PIM settings, though, otherwise things may get confused.

Sorry, I should mention, I am on a corporate BES. If BB wins conflicts does that mean all data entry has to go into the BB, not laptop or PC?