The Buckner & Garcia LP had singles; I haven't seen evidence of 12" versions of them around--but the 7" pic sleeves for "Do the Donkey Kong" and "Ode to a Centipede" (and "Pac-Man Fever") exist for sure. I'd love to see scans/photos of the covers, icki!!! Google, eBay are turning up squat.
The Asteroids LP took me by surprise--all I know is it's unrelated to and predates B&G, and uses the 2600 box art on the cover. There's got to be more like this!
I was hoping for "Saturday Supercade" tie-in stuff, which might include Frogger, Q*Bert, Donkey Kong Jr. and even Pitfall. Haven't come across it yet.
Speaking of the "Supercade," I did a history of game cartoons, recently, at
http://regulus2.azstarnet.com/blogs/readygamefire/4757/ .*
*May induce Pac-Man Cereal cravings.