Hey I`m a graphic design studen on my last year of study. I`d be more than happy to help you out.
But, first I need a detailed description of what you need.
The size of the banner, do you want it animated?
A detailed description of the mascot.
What excactly do you want to express wit this banner or "eyecandy"
And what kind of feel doy you want it to have, or more importantly what feelings do you wish to ivoke in your target audience?
The more I know the better I can try to give you what you want.
All I want in return is a little honor and glory, aka some form of recognition.