I've watched a great deal of their runs and bonus streams they--or other viewers--have posted from their past events. They really are amazing and incredibly humorous to watch. I think a lot of you will enjoy their runs...
Some personal favorites I can name off the top of my head are Battle Toads and Double Dragon, all Sonic Runs, Amazing Crash Dummies, Arkham City, and Double Dragon Neon. The last one was highly amusing because they developers were watching and answering questions in a skype chat the runner or others had about the game, while at the same time watching their game being broken right in front of them. :)
It's hard to choose my favorite runners, but here are some I can name off the top of my head that I watched recently:Feasel, Funkdoc, Murphagator, spikevegeta, and paraxade. There are a bunch more and highly recommend watching these runs.
Much thanks Ramza for posting this! I was hoping someone would put this together! <3