BoomTown is also not quite sure what to think of another new advertising campaign from an Internet giant--this time by eBay.With the tag line, "Come to Think of It, eBay," the print, television and online marketing campaign start today to "boost its standing as a holiday shopping destination."Interestingly, it has been crafted by San Francisco-based Goodby, Silverstein & Partners, which has also just nabbed the lead role in the $100 million advertising campaign by Yahoo.