The company I work for now, copy.com, just had our public launch today! Copy is a cloud storage service with a sexy Web UI (the part I work on) as well as desktop clients for the major operating systems, as well as mobile apps.
Check us out, make an account, and start uploading files. And of course, if you find any issues, be sure to send feedback. You get a whole 5GB to store, with the option of upgrading.