Aites, first of all, sigs/avas go into Mixed Graphic Arts
Once there, you shouldn't make your own thread for a request. You can either go to the various galleries of artists, many of whom will be all too glad to do your banners, and request. You can look and pick who you like best.
Or, you can simply go here
and ask for a banner from anyone who is willing. This is generally faster, but quality could be drastically decreased.
oh, or as a third option, you could press alt+f4, and it randomly generates a sig for you. I got the one I have by pressing it. At first, it exits the program, but if you press it 5 times while returning to the same page you originally pressed it on, you get the banner.