Dropio is an online storage provider that packages Web storage in chunks called "drops." There is a free version of the service that lets users share files up to 100MB in size
drop.io is good for sharing files, music or documents via twitter once you link your drops with your tweets. be sure to set a password and if you have public sharing, you might want to monitor files before they become public tweets.
overall it's easy to setup (just provide your username and password) and is great for sharing files or autoposting every time smoene drops a file.