In the comic books thread before the great purge of 2011, I linked to a Kickstart page for a Transmetropolitan tribute book for charity. I'm happy to report that it has received enough funding to go to print!
Here's Darick Robertson's cover for it:
Warren Ellis is writing a forward for it.
Haven't read Transmet...but that Darrick 'THE BOYS' Robertson cover is pretty damned nice.