As it turns out... yes it is! I had completely forgotten about it until yesterday, but yes, the Outsyder Gaming store is still running, even though it hasn't been updated since November 2009.
What made me remember that it was there? A customer! Whoooohoooo! I just mailed his eldar pulse laser (from the falcon kit) this morning.
Now I just need to update my inventory. I've got a bunch of new stuff that needs to be added, like some used D&D stuff, some older Magic: The Gathering cards, and the razorback/Dark Angels bits left over from my Blood Angels.
Thanks to all my visitors... especially the ones who visit the store!