I know they are creepy and targeted, but kind of loosely (which amuses me greatly). I know I am propagating their gently invasive advertising model by discussing it here (and reprinting links). But damn, they make me laugh a little.
The Palmpillow (which itself, has Google ads for other smallish travel pillows because it's free targeted advertising, thus effectively cannibalizing itself)
Modern Mountain Man's Big Agnes dual sleeping bag (both the website name and product line name amused me)
Dress Modest (for those who shun low necklines and muffin tops for G-d)
The Internets iz Fun!