I've been looking for a good location for Filk music - my old Pegasus recordings just aren't holding up as well as I'd like.  Well LazyCoder just distracted me with a tweet, and I had to go and find a link to one of my old favorites.

Stuck Here

I still haven't managed to find a place that has Leslie Fish's "Suprise" though.  Prometheus has the "Russian" version, but I still remember her singing it and enjoying it more. 

You can also find the lyrics to another 3 of the true classics (you can still find me humming "Three things never trust in..." every so often or "Don't push that button") over at Duane's Filk page.