their first few albums displayed huge amounts of creativity and originality (such as "dig your own hole" and "surrender") that obviously could not be sustained for very long. i beleive they have passed their prime; and they know it, so they are currently collaborating with other artists, and the music they do now sounds almost nothing like their past.
one song of theirs that became really popular was "block rockin' beats".
a.k.a. "Drug Buddy"