Here's an interesting spam gimmick - do a search for something in Google / Yahoo / whatever:

.....meanwhile, the bad guy has stuffed a bunch of keywords into a Flickr screenshot page, then inserted one of those wonderful stock trading spam messages into the screenshot area. When people arrive at his Flickr page, they see this:

....awesome. In fact, this particular profile is stuffed to bursting point with keywords galore leading to yet more trading spam...

......and a pile of Viagra / cheap software garbage, too:

What site will the spammers ruin next?