Googlert

" 'Googlert is an experimental free service which keeps you updated on what the web is saying about you, your products or your interests. It does this by performing regular Google searches on your behalf and sending an e-mail alert containing any new results that appear.' " [via Search Engine Blog, via Library Stuff]

You'll need your own Google API key, but you can sign up for a free one pretty easily. I'll have to play with this when I get home and find mine.