You might also try American Woodworker Magazine. They had plans for a
work/tool table in their October 2000 issue (#87 I think). This one used a
torsion box for the base, had ample storage for the powertools, could add a
router table to the system, had casters for mobility and a leveling system.
I tried the web address but all I could get was an "Under Construction" page.
The address is www.americanwoodworker.com