There's thousands of design portals on the web, but when you need advertising inspiration (or just want to enjoy the creative minds of the global, relatively un-PC) Ads of the World is a pretty good source.

I particularly liked this ad for hairdryers and this mouse pad ad/concept is fairly interesting (if a tad off-color). I think that a lot of sites forgot to have an attention grabber on the home page or in the headlines and these ads are certainly a step in the right direction on that front.