SoundCloud

http://ping.fm/p/L0Ndz - Someone just linked me to SoundCloud. Looks quite interesting.

"SoundCloud is a web based tool for sending and receiving music, both public
and privately, and is a perfect replacement for having to use things like
yousendit, zshare, sendspace, FTP etc. SoundCloud also allows people to
leave time-coded comments in a waveform of the track in the SoundCloud
player. This makes feedback and collaboration on tracks really easy."

http://soundcloud.com/