Who's the creator of this spot? And can only the creator of the spot change the icone and banner of it?

I don't know who created this spot...

But for changing icons/banners...you could make a pick asking the fans what they would like as their new icon/banner (give them a chance to make some first if they want...you could use a forum ou something for people to soumettre their icons/banners) then send a message to Dave with a link to the new icon/banner and he'll change it for you.

But wait a little while for the creator to answer this...if they don't, then make the picks etc.

Hope that helps some! =]