OmniDrive offers a couple of interesting twists on the standard storage in the cloud idea with the ability to publish files with one click (assign a unique URL to a file) and an embedded music player that lets you listen to MP3 files you've added to your web store.
Proposed pricing (yes, this is a beta) is $40 per year for 10GB of storage. Linux and mobile clients are reportedly on the to-do list as well.
And yes, I am aware that the screenshot posted here is from a Windows XP system. I'll swap it out for a Mac screenshot as soon as the beta is available. ;^)