There are many wonderful tributes around the web, I’ll see if I can pull together as many as I can. Stay tuned.
Jason’s KIRBY-VISION is offering a Kirby portrait gallery.
Harry’s Simon & Kirby blog has a nice cover gallery.
Bob’s Jack Kirby Comics blog has some links from around the web and blogiverse, as well.
Just as a fun celebratory gesture, a gallery of the scans of Kirby’s pencil artwork for his adaptation of the 2001: A Space Odyssey is open. Hope you enjoy!
Or, here’s a sample: