Testing out some mp3 hosts, I can't possible host every mp3 on my server:
Santogold - LES Artistes (Grahm Zilla Remix) ... zShare - Apparently, if you're using FireFox and have that Adblock Plus plugin installed, you won't be able to download from here (please whitelist PMA if you use that plugin — accept my ads. Bloggers gotta eat! :) ) BUT zShare lets you preview the audio before downloading anything (though their ads make me feel sort of awkward). Oh and extremely slow uploading (SaveFile is 4x faster, MediaFire is 3x faster). I sort of hate zShare.
Fleet Foxes - Tiger Mountain Peasant Song ... SaveFile - As far as downloads go: it's fast and simple, though uploading is a pain, but I can live with it.
The Black Ghosts - Any Way (Fake Blood Remix) ... MediaFire - The only problem I have with MediaFire is that their servers are iffy and the uploading process is usually glitchy.
Which works best for you?
I'll stick with Mediafire and SaveFile for my mp3 hosting issues. zShare is officially out. I will also use my pmatunes.com server as well.