I'm in Edinburgh now, and I've got to pay my respects at Hume's tomb. And when I get back to London, I'll make sure to see Jeremy Bentham at UCL.
Mostly, I'll be hanging out with people at Oxford after I get back. If you're in the London or Oxford or Edinburgh area and want to hang out, I'd be happy to meet up! Send me an email or comment or something and I'll see if we can get in touch.
The talk at KCL went really well. I was happy to meet M.M. McCabe, the dissertation advisor of my senior thesis advisor, Raphael Woolf. It was also a nice feeling to give a big defense of hedonism not far from where Jeremy Bentham's body is displayed.
If I'd been to London earlier, I would've asked Bentham to be the external reviewer on my dissertation committee. We have similar views on a variety of issues, and I'm sure he wouldn't have said no. Getting him to provide comments on my work or write a good letter of recommendation would've been difficult, but that's always a risk when you have famous people as your outside committee members.
(Update: I couldn't find Hume's tomb, though I did find his statue and get my picture taken with him.)