They are a great band Chad but there isn't really any "new stuff". Their last studio cd was 1999's Antipop.
What you are probably listening too are their compilations and greatest hits records like They Can't All Be Zingers. All of those songs were off of the old cd's which were awesome. Les Claypool is a total nutjob and his lyrics are classic.
the dude is awesome on the bass guitar. i was just watching a video of them at woodstock on youtube. the guy was playing the song "master of puppets" by metallica. he was playing that on the bass guitar and it was just too awesome.
stay tune...