Xbox Music catalog buildup

Anyone else with a Zune Pass noticed that there's a whole bunch of new music showing up in the Zune marketplace in the past couple of days? I'm suddenly finding obscure artists from decades ago that weren't there before, popular artists whose albums are suddenly doubled or tripled, and a whole bunch of new artists with artist profiles and photos that weren't there a week or two ago. Music marketplace also keeps going down for several minutes at a time, so it looks like they're into the final push to fill out the artist catalog in advance of launching Xbox Music.