Actually, the GC line is being fully redesigned (codenamed "WK"). They'll offer both the current size (more or less) plus an extended-length version with the third row option.
Also... Jeep Compass in '05. That's not definite but it is *expected* to happen. Pics of the concept are all over the web. A rally-like vehicle.
There's also rumours about a Jeep "Commander" being in development... a largish three row vehicle to compete with the likes of the H2. To debut in around '05 or '06.
Wranger is supposed to be redesigned in '06.
And, I wish I could find the link, but I read somewhere about two weeks ago that they'll likely be increasing the size of the Liberty when it's redesigned in a couple more years. It's supposed to grow to nearly the size of the (current) GC. Not sure if I believe that one.