Gravatar support
I've added gravatar support to the website. The gravatar system is a clever way to create identity on-line: e-mails are associated with images. Critically, the URL associated with an e-mail doesn't include the e-mail itself, but instead an MD5 hash -- this way, spammers can't harvest your address.
I was disappointed to discover that Google Chat doesn't have support for gravatars -- a Google labs feature I would use.
UPDATE 2024-12-14: I'm not bothering to support these in the ported blog. Sorry!