we normally just create a master table centered, size 750
that way the page always looks the same, only a few people (640 res) don't see the whole screen
if someone comes in bigger, it still looks the same, only more blank space on the side
when you go 100% tables then you can't control the real lookof the page,
some people don't want to control the look
we found that the master table set to 750 pixels is the way to keep a page looking the same no matter what the res of the viewer is
all you have to do is test your sites once in a while at different res's and using both IE and NS
you'd be amazed at how the site changes if you don't try to lock in a specific size
plus you should define a common font, something a lot of people don't do
we usually use arial or verdana
size 1 is a little small but it gets in a ton of info
size 2 is easiest to view
there's a place on the net that can check your html after you're done
I forget the name
but it looks at your code and image size and download speed and it tells you if you have any major html problems
maybe someone else remembers the name of that site
I think MS bought it up
maybe it's not around no more
but for newbie designers, it does give you some good tips