If you’re still catching up on some of the music that came out last year — I know I am, and I listen to new records for a living! — you’ll appreciate the public service that blog aggregator The Hype Machine is doing with its new “Music Blog Zeitgeist 2008” feature. They’ve tabulated the artists, albums, and individual songs that were written about most often this year by the MP3 bloggers in their database, and they’re streaming the top 50 entries in each category. That’s 50 albums, 50 artists, and 50 songs being rolled out over the course of this week, all available for you to hear for free in a nicely-designed package. Pretty cool, right?