Well, guy, I'm not sure it's polite to show you other sponsors banners and say "these are good"...

The banners you had were okay - there were 5 for the site I was looking at, 3 60x120 looking buttons and 2 468x60 horizontals.

That's way too few, and those are close to the least useful sizes. Just make 10 or 15 more, in larger sizes and with some odd shapes. Or give people .psds of the logo and the sales text and let them make banners and gallerys.

And you need a gallery export tool - I didn't find one at least.