Actually, before posting I did run a search using 'Raptr' as the keyword. All I got back was a blog post though.
But alas, I should have looked more carefully in the sub-forum I was posting in.
Microsoft and Raptr are giving away a free month of Xbox Live Gold with free copies of The Maw and R-Type Dimensions as part of Raptr's Rewards program -- any Xbox Free/Silver member who is also a Raptr member (or joins Raptr) is eligible -- well, at least until 15k codes of each game run out...