I was just looking at the xenForo logo and decided to very quickly (10 mins tops) to knock up my own version. I'm assuming the current logo is not the final logo but thought I'd give it a crack any way and see what people thought. (again, this was a very quick mockup in photoshop)
If I have time I'll play around with creating some XenForo typography, and then make a wallpaper.
I was actually going to make an userbar or some type of image to put in my sig for some other sites (Most of the sites I go to, where I'm friends with the owners, I've been trying to get them to switch to XenForo when it is released).