I finally saw 30 St. Mary Axe in person--from a distance, mind you--but that was probably worth the long bus ride into the city. Actually, I saw it while looking across the Thames from the south bank near the Millennium Bridge, so that's two Norman Fosters in one glance.
Also, for you bollykids, I was briefly in Waterloo Station today. Catherine, you will recognize the guy standing next to Mr. Bachchan in that video clip. And while I'm posting Jhoom Barabar Jhoom links, this one is kind of sweet.
ETA: Sorry, fixed the links.