If you're a Google Chrome user I suggest you head over to ex.fm, setup an account and install their music player extension. Basically, the add-on runs in the background monitoring pages for mp3 links that you can add to an in-browser queue and playback as you surf around - not having to stay on one page to hear particular songs. You can "Note" songs to mark them as a favorite and see other users "Noted" songs. There's also a Music Library that keeps tracks of tons of music sites and allows you to browse their mp3 queue without even having to visit the site (still on the fence with that one).

At the very least, it's an incredibly effective way to listen to mp3 blog offerings while still being able to move around the web at your own speed. Absolutely worth trying out.