I'm ambivalent about this site, because it's absolutely nothing whatsoever like those tangible mixtapes that I once knew and loved, but it is pretty easy to pull together a clutch of songs for instant sharing (not that I think you can download any of the tracks). The GIANT FONT PLAYLISTS are also irritating, but the size of the font does kind of express how much I like each of the songs I put on the mix.

I'm giving it a go so you can give it a go:

http://radiozilla.muxtape.com/