I might bitch about eating our own dogfood, but a lot of the time it's actually pretty damn tasty.
For example, I can't remember how I ever used a laptop without the combination of folder redirection and offline files. Microsoft's technical support staff use folder redirection to give each of us a gigabyte of storage space on a central server, mapped to My Documents. This is pretty nice in itself - since they back up that server, there's no need for me to bother with all the hassle of backing up my personal machines. In this sense folder redirection is “just” a personal share on a server.
Combine folder redirection with offline files, however, and you've got a killer feature for laptop users. When my Tablet PC is on the network, I've got full access to My Documents. Then I go off the network - and I still have full access to all those files, stored locally (and transparently) under C:\WINDOWS\CSC. I can modify them to my hearts' content, knowing that when I reattach to the network mobsync.exe will automatically detect this and let me synchronize all changes. And since I'm the only one touching those files, and I'm rarely working on more than one computer at once, synchronization conflicts (when it asks you to choose whether to keep one or both versions) are equally rare.
Notes and gotchas:
Any tips that I've missed? People seem to either love or hate offline files. Me, I just remember the hell of roaming profiles…