First! Heh. I’ve never done that before, so figured I’d see how it feels. 🙂
Anyway, I use gmail, and I’ve recently started using Google docs for some stuff like my racquetball league schedule so I can quickly check from home or work.
To some extent, of course, social media is the cloud. Instead of using dedicated apps like ichat or AIM, I use Twitter to talk with colleagues and Facebook to share w/friends.
I use shutterfly to share photos with family instead of emailing them around.
I’ve never used any of the backup, music, or finance apps.