I found these two pictures on the web, one of the Gladiator interior, and one of the 2007 Wrangler interior - a camoflaged test mule. This strongly suggests to me that the Gladiator is a really good indication of what the forthcoming Jeep Wrangler is going to look like from the B-pillar forward. This has been confirmed by some in various Jeep forums, but this is the best evidence that I've seen.
Here's a picture I took at Camp Jeep this past summer.
From what I've heard, I don't think they plan on producing the Gladiator - at least not in the 2007 model year, but since it seems to share the same platform as the 2007 Wrangler, I wouldn't be surprised if we see the Gladiator, or something like the Gladiator for a later model year. I'm just speculating.
They created a finished concept that everyone thought was going to go into production back in 1997 called the Dakar, but they never really did. Actually, they did produce the Liberty, which borrowed styling from the Dakar and the Jeepster - but it didn't have the rugged characteristics and functionality that everyone loved about the Dakar concept.
Regarding the 2007 Jeep Wrangler, here is a good consolidation of information about the upcoming model. I'm sure its largely accurate.
There will be a two-door version, and four-door version. The four door version is rumored to be called the "Jeep Rescue", not to be confused with the concept, but I'm sure its styling will be inspired by the Rescue concept.
I'm really excited by the four-door Jeep. It looks like it may be a really neat vehicle with alot of space compared to the traditional SWB Jeeps. I love my Cherokee, but I'm sure I'm going to have Jeep envy once its finally unveiled.