I manage a SMB network, 100 desktops, 25 laptops; all windows XP or Vista. The desktops all store data on servers, but the laptops are sometimes off the network for weeks at a time or even indefinitely.
We haven't been able to find a good solution for backing up all or part of the laptop data.
Considerations: Expense - cheap is always good. (and gets approved easier)
Central/Partially centrally managed - We would like to be able to have reporting on what is being backed up.
Configurable - ability to limit bandwidth used at times. (don't need to saturate the network when the sales team has a meeting in the office first thing in the morning) ability to recognize when on a decent connection and our VPN and trickle updates in.
Synchronization - ability to move data both directions - updates from files on the network to the laptop.