No offence, but I was going to throw up a couple of designs, now I, along with most designers would charge alot more for a logo design, but I tend to throw something together on here when there is a $100 contest, because it can be worth it to get a potential new client.
But then I thought about it and feel there is no way I would go and put up a design for a possible $100 for "A Logo Concept" that will be branded and used throughout multiple websites - example something like EBay. That is worth a hell of alot more then $100.
edit: A quick logo, but not a brandable concept