Nobody's mentioned this yet, so I will.
Grizzly sent me a little e-mail newsletter announcing their workshop
planner. The idea is that you specify the size of your shop space, and
then you can drag into it just about any Grizzly tool you want to
experiment with different layout ideas.
They actually have a bit of a sense of humor, too. You can drag in
amenities like a stereo, speakers, a sleeping dog, and a sleeping cat.
Since so many tools from different manufacturers are of similar
dimensions, this seems like a great tool even for (cough, cough...)
those few of us who don't own exclusively all Grizzly tools. :)