Jane's router table project consists of a step-by-step tutorial of building a small, compact router table.  This one has doors with storage areas behind them. 
Build this nice-looking router table with tons of storage.  This tutorial has lots of pictures to guide you in the building process.
Here's a unique idea.  Combine a 30 gallon trash can with a router tabletop and voila!, you have a router table base. Nice for a garage or small shop.
If you are looking for plans for a very basic router table with a built-in router lift, here ya go!  Building materials include a half sheet of plywood, small amount of lumber, hardware, a router mounting plate and a router.
Plans for a smaller router table that can be used quite nicely by the weekend woodworker. The table top is 16" x 30" x 3/4" and is made from plywood.