Now I've not seen this fully documented - and for some of you this might be obviously possible - but you can mishmash GameBanana's "Profile Template Code" with some unique HTML fuckery to achieve some unique results - up to what it allows!
As you can see here, I've gone and used some HTML modules from a regular mod submission to make my profile appear just like an upload!

You can perform regular HTML basics: Text on a new line.
Bold, italic and underlined text etc...

It's not the most stylish in comparision to Uberstyles, but hey, do you have bold text on your GameBanana profile without Uberstyles?
Didn't think so

It's a bit iffy with what's possible though