2009 my choices so far:
PPP - The Abundance Mixtape: A lot of remixes and unreleased stuff from Platinum Pied Pipers. Very bouncy, upbeat and soulful (favourite: Shotgun (Waajeed's Plinky Remix)
Blu - Herfavoritecolo(u)r: Another mixtape by LA wunderkid Blu. Some very nice instrumentals and abstract rhymes (personal favorite: Beggars/BlackGold)
Doom - Born Like This: Doom being Doom. (personal favourite: Absolutely, Gazillion Ear, Yessir!)
Dr. Who Dat? - Beyond Tomorrow: Banging spacey instrumentals ala Flying Lotus. Very tight!
Exile - Radio: Didn't think this would be good (making an album off samples of LA radio) but these beats really are cohesive and head nod worthy!