Leopard - release date?

When is it supposed to come out? i tried searching around but couldn't find anything, so apologies if it's aready been talked about - and even if it isn't official, what's the speculation?

Nobody know for sure right now, but further will be told at the WWDC.

Its supposed to be close to January 2007 around the release of Windows Vista.

This is from the Leopard home page at Apple.com;

"Coming spring 2007."

i wonder if my system would be able to handle it.. also will it take up more hd space