Fran's no chemist but here's

The periodic table of all periodic tables on the Web
(click to zoom in and out to see some amazing periodic tables available...
"Also available on Flickr — make sure to read the caption if you're a chemist, datageek or curmudgeon.
Sorry for the lame interface here. Click anywhere to zoom/drag and click the arrow icons to go to that periodic table (link will pop in a new window)."

Fran's favourite is CA of course....