http://www.shacknews.com/extras/2006/032706_scotthenson_1.x
Shack: How will we be seeing the Dashboard improve on the 360?
Scott Henson: I don't think we've given an official date yet, but in the not so distant future you will see another update that will improve a lot of how stuff is sorted and shown in the Marketplace, just to make it more efficient. We're going to do a lot of nip and tuck cleanup work. One of the biggest things is the ability to download things in the background.
Shack: Thank you!
Scott Henson: Yeah, as an avid Marketplace downloader I can say hallelujah! I don't know what the official PR line is on the availability, but it's not that far away.