It looks great Pen. I still think either RS needs to be dropped from the banner or at least be put last in the rotation as Brent suggested, as they have absolutely nothing to do with this project. JD and Yak then should be bumped to the front. Personally I'd prefer having only JD, Yak, and FFURG on there, as they are the only sites that the UGP has a presence on. If we want to include the whole customizing community we'd have to add Galactic Hunter, TheJawa, and a few others. I think at that point it is overkill, and the banner would take too long to get to the point.
The background looks great right now. You did a real good job combining all the differnet elements to get one complete image.
Right now I'm noticing the text that belongs in the text box there is actually off to the right and is only about halfway inside the box. I tried reloading the page several times to see if it just goofed the first time, but it never loaded correctly.
Other than those two little flaws, it all looks great so far.