Some great abstract beats coming out of the US these days; e.g. Flying Lotus and company. Now comes this from the East coast, brilliant stuff:
http://www.boomkat.com/item.cfm?id=177587
And if you are following dubstep, this should not be missed, fantastic stuff from London:
http://www.boomkat.com/item.cfm?id=202591&highlight=202594
Mohsen