On my friend's shopping site, which I built for him. (Not massively original design, I admit, but it brings in the money.)

SEO win

Spam

My email address is hidden from spammers without being obscuficated. I just used an image of it. (The ALT text spells my e-mail address out phonetically for accessibility.)

Robots

I've written and used a robots.txt file for the first time, so it'll be interesting to see if this stops robots from chasing down links to PDFs, etc.

Webservices Actually Work Now

I have an entire book section driven by the Amazon REST APIs (What is REST?) , so I think it's fair to say that this stuff really does work now.