Of Montreal's latest album "Skeletal Lamping" is awesome. It's experimental, funky, lyric driven goodness. If you haven't heard it yet, check them out.
Here's a version of M.I.A.'s track "Jimmy" that they covered. Love it.
Of Montreal - "Jimmy" Cover
BTW, it turns out that the M.I.A. version of the song is actually a cover of this: