There are oodles of Jack Kirby celebrations on the Internet today. I'm swamped at the moment and too busy to start linking to them now but I'll point you to one…
This year's Comic-Con International paid special note to Jack's 100th birthday and its souvenir book included a wonderful 60-page section of articles, artwork and photo. For anyone interested in Jack, it's a must-get and they've put it online as a PDF for your downloading pleasure. Get it now and read it at your leisure.