IMHO, adapting to the look of the '07 model's exterior lines is something that will just take a little time. Seeing it "in the wild" and along side other trucks in the field -- Dodge Ram, Chevy Silverado, Ford F-150, and Nissan Titan -- the subtle differences will begin to stand out that will truly tell whether or not Toyota did something "special" or if they have fallen victim to focus group design influences.
Same thing goes for the interior; although, here I'm a bit more skeptical. I thought Toyota had the dash layout right with the '89 - '96 model year pickups and has been going away from that even since. The '07 dash and interior is well off the reservation for my tastes -- not as bad as the Honda Ridgeline, but not great. Mind you, I'm not a big fan of the "pod" in my '06 Tundra's dash either; I think my '02 Suburban's dash layout is better aesthetically, ergonomically, and perhaps even with regard to materials. However, the '07 Suburans have also gone off the deep end with regard to dash styling -- more along the lines of it's higher end car designs with all of the wood grain accents, but with lots of sharp edges and boxy features.
As for the Tundra design, what has always appealed to me is its scale. I don't want or need another full-size truck, but the Tacoma is a bit too intimate for four adults. The Tundra's sizing hits the sweet spot: easy fit in the garage, nearly as much useable space as the Suburban's front two passenger areas, and a very simple, clean design (well, aside from the RoboCop grill treatment).
So, at least for me, I'll hold my final assessment of the '07 until I become accustomed to seeing them. I think I'm still struggling with the scale -- bigness if you will -- than anything else... and some shared similarities with the other big trucks.