Offers up a quick tip (though meant specifically for K2 hacking, I’m sure any gravatar user can adapt it) on linking a commenter’s avatar to their own blog, rather than back to the Gravatar web site. While I agree it’s good to promote gravatar’s site, (I use a link below the comments box on my personal site), I think it makes much more sense to let the avatar act as a link. I’m surprised I hadn’t seen this tip before.