With some exceptions (read: Geometry Wars), the best selling games on XBLA tend to be games that people remember playing in their childhoods. On the other hand most of the best rated games tend to be from Indie developers. Due to this, and due to the manner of XBLA, it should be no surprise that many of the winners and runner-ups at the Independent Games Festival (IGF) are, or will, be coming to the service. It seems that this trend is continuing with a sequel to the 2005 IGF - Audience Choice Award in the Web/Downloadable category, N.N has a description of:

 Metanet with Klei Entertainment are working on the sequel dubbed "N+" and will be adding such features as cooperative and competitive multiplayer. You can check out the original N here and see how addicting the gameplay is for yourself. N+ is currently slated to be released June 2007.We will keep you updated as more information becomes available.