Check out Soundcloud for uploading, sharing & listening to new tunes

From Music Business & Trend Mongering I saw Soundcloud:

lets you move music fast & easy. The platform takes the daily hassle out of receiving, sending & distributing music for artists, record labels & other music professionals.

More:

We love audio. And we don't discriminate against big files in strange formats, we welcome anything and everything audio. We've made it damn fast to upload and choose who you're sending to, no matter if they're on SoundCloud or not.