I think it's
safe to say that the most attractive feature of .Mac is the ability to synchronize data
between Macs (next to those exclusive Dashboard widgets, of course). Wouldn't it be nice to sync your bookmarks,
calendars and contacts, plus Mail accounts, rules, signatures, and smart mailboxes to all of your Macs for free? MildMannered Industries shows you how.
Using MySync, you set up one machine as the "master" and others as the "slaves." The process uses the Apple Sync Engine that's built into Tiger, and once you've got everything set up, you can configure the slaves to sync automatically on a quarter hourly, hourly, daily, or weeklybasis, or leave syncing to be activated manually.
MySync requires Tiger and is free.
[Via What Do I Know?]