Tagyu (via Lifehacker) accepts a URL (or some text) and gives you some tags.

Tags for AjaxPatterns:

ajax javascript programming web

Tags for SoftwareAs.com:

ajax tech webdesign design blog webdev web_2.0

Consarn it! It actually did a good job! I was hoping something off the mark. “ajax beethoven web anime french_history software” would be more like it, thanks.