I'm currently working on a table myself - however, at this point have made no drawings and probably won't untill I start making the fence, and those drawings will be sketchy at best - however, maybe take a look at these for some ideas, and they'll also lead you to some other sites and plans: http://www.rareplans.com/jump.php?go=10
There's different feelings out here as to incorporating a miter slot in the top - I personaly will have one (don't yell at me Jerry! LOL) because of some of the jigs I use. However, they're certainly not necessary.
Also I think it was the Dec issue of Popular Woodworking that had a feature article on making the "ultimate router table" (why is everybody's table "the ultimate"?) I think he spent way too much time on the rolling base (although it was pretty ingenious, at least to me), but again, some ideas on size and construction in there, as well as dimensioned plans.
In my opinion, tables can be as simple or as complex as you want or need - but it is a tool, not an end product - my advice is to make it as simple as you can while still meeting your needs. Probably the biggest question (as with life in general) is actually figuring out what your REAL needs are. My own perception of my needs has been refining constantly (mostly in a downward direction). Don't get me wrong - take pride in everything you do and do your best work every time, but don't lose sight of what's critical.
Sorry for running at the mouth again - my thoughts anyway and maybe a few sites that can help.
OOps, sorry - just saw that CanuckBeav already mentioned the article I referred to and says it was Woodworkers Journal ... at any rate it was a good one, but perhaps a little elaborate. Depends on what you want and need.