Is that already 10 years since I signed up? First it was free, later I paid for it. Now it's named MobileMe.
I'm still using the disc space (good to have 20 GB extra on another server for file downloads). Also synchronization between Macs for my calendars and contacts is a must. And of course when traveling and you have to send an email and none of my Macs (or iDevices) nearby, the me.com login is easy to remember.