There's been some issues with older browsers not being able to handle transparent PNG images (causing an ugly white/blue box around the sig). As a result, I am switching to transparent GIF images - which all browsers should be able to handle, just means not quite as nice a finish on the edges.
This thread may now be closed, as the vote has been conclusive. The shop will be opened.
I appreciate everyone's enthusiasm on the subject -- but let's all try to keep to the topic at hand, shall we?
@ Whiteghost: Once I have redesigned the sigs to be more diablo-y (as was requested by the general population), I will work on setting up my shop.
One thing I want to stress is that I am striving here to create a single standard sig for SICK members, not meaning that you can't have your own sig of w/e you want, but I don't want to see other SICK Sig Shops popping up in the SICK Section, like what happened to the D3 Art Section. I have already had this discussion with the SICK higher ups about standard graphics and such, so I'm also sort of the "official" guy in charge of this sorta stuff (I guess).
Today I will work on my design to incorporate some of the suggestions I've received here, then see what you all think.