I signed up for .mac so that I could back my pictures up into a storage area (after my desktop fried last year, and I learned a valuable lesson), and synch my bookmarks on both computers. I don't know anything about groups, but I haven't looked for them either.

I still haven't gotten to the Apple store, and don't know when I will. I bought iLife '08 when Rich was still here, I think, and it's still unopened. I'll catch up eventually.