Here is the .PSD file if you want to have a go at improving it/add you own slogan.
Here's my first attempt-

Notice how the "old slogan" is now in the present progressive. lol.
Idk, I don't think it's to bad for a first attempt. It could make a nice patch or something. I mean, it has a variation of the old slogan, the URL, and our favorite x-s guy.
I'm not to sure about the outer circle font though.. or the colors.
Ehh, idk.
btw, I could easily do it with a white background.. IMO, it looks better and more natural because then I don't have to crop the x-s guy out >_<.