I really want to go dancing right now.
Of Montreal - "The Past is a Grotesque Animal", from Hissing Fauna, Are You The Destroyer?
LCD Soundsystem - "All My Friends", from Sound of Silver
Gui Boratto - "Beautiful Life", from Chromophobia
Glen Hansard and Marketa Irglova - "When Your Mind's Made Up", from Once OST
Andrew Bird - "Plasticities", from Armchair Apocrypha
The Cool Kids - "88", from The Bake Sale [forthcoming?]
White Rabbits - "The Plot", from Fort Nightly
There's a Teiam Player track out there somewhere using "The Plot". Go look for it if you missed it and care.
The rest of the favorites are here.