Zortic by Mark Mekkes started on Keenspace in 2000 before getting snapped up by Keenspot. Here's a snapshot of artwork from the beginning and very recently:
(Above, part of the very first Zortic. Below a very recent Zortic)
And just as a bonus here's a Zortic from a storyline parodying the DaVinci Code which works in a Websnark essay.