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. :)
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Joe