Enter Droplr. This tiny application sits in your menu bar and allows you to drop all manner of files onto it and share them via a variety of venues such as Twitter or email. The tagline "drag, drop, share" is about as accurate as one can get when referring to Droplr's simplicity in file-sharing. If you're intrigued, head on over to the Droplr homepage and peep the screencast they have made available.
The Snow Leopard-only app and hosting service is available now for free (as in ad-supported) with 1GB storage. Don't be surprised to see a for-pay option with no ads and additional storage in the near future. Go check it out and let us know in the comments how it works out for you.