It appears as though Microsoft's plans for an August launch of its Games on Demand service is popping up a bit early. Why just this morning, we spotted a listing for the already confirmed Mass Effect (sporting its snazzy new Platinum Hits packaging) in our Xbox.com Marketplace RSS feed. Unsurprisingly, the listing has been removed from the website itself, though RSS feeds won't allow for editing after something has been published.
As 360sync.com rightfully points out, game manuals will be provided virtually through the Xbox.com Marketplace website according to the listing, so you've got that going for ya (which is nice). We're not sure when these puppies are showin' up on XBL for sure, but from the looks of things, we'd say sooner rather than later. For a video tour of the upcoming Games on Demand service, hit the break.