I love the references and all, but I find it a bit awkward that this (as of now) PS3/Vita exclusive has almost only Nintendo or other references, but no Sony ones.
So far I've encountered Mario & Luigi (poster), Mega Man (8-bit sprite in bricks), Viva Pinata (building), Space Invaders (brick-form), several internet memes, Link (poster), Mega Man E-Tank (poster), Mega Man vs. Skull Kid (poster), Donkey Kong (statue), VVVVV (painting), Castle Crashers (poster), Minecraft, Grim Fandango and of course several Metroid ones (chozo statues, Metroid statues, the game structure itself).
As I said...awkward.