Maybe we haven't seen the last of the Gold Key comics reprints yet
Volume 6 of Checker's Star Trek: The Key Collection has been listed for so long on Amazon that I'd started giving up hope. The expected publication date changed once or twice, but there were no real signs of life -- no solicitations in Diamond Previews, no updated info at the Checker website. But now Amazon has a publication date of November 25, 2008, and someone using the name checkerbpg has posted in Trek-related topics at Newsarama as recently as March 14 that Checker will be publishing a few Trek graphic novels later this year.
In other news...
Amazon has some clues about other developments in Star Trek graphic novels, though the publishers affected haven't made any announcements. All I've got so far, aside from what's on Amazon, is an off-the-record remark from someone knowledgeable but not involved.