Random Semantic Bits
Some interesting links for the week:
Folksr is a project that intends to gather people’s votes through their microformated links. You login with your openID, and from then on just add rev=“vote-for” and that’s a vote! Of course this is only for geeky people. But an interesting proof of concept anyway!
MOAT is a way of giving meaning to tags (via URLs). Its a cute project, but I don’t know if it will be useful. Anyway, there are already public servers and a Drupal implementation. Wordpress already in the TODO list.
Gravatar is attached to your email address and is not open nor distributed. The future is URL-based and distributed. There already two alternatives: pAvatar that seems more (unnecessarily) complex to implement, and hAvatar is just the photo on your hCard. Pretty simple hein? I just got one problem: When more than one hCard are present in the page, which one is the author’s? Tantek uses the class author, but I don’t find it in any other website. Any tips?

Tantek
For publishing/determining authorship, you can use hAtom.
http://microformats.org/wiki/hatom
That is, markup whatever the author has written as an hAtom entry and the author as an hCard with additional class name of "author" per the hAtom spec.
For the question of which hCard on a page is representative of that page, see:
http://microformats.org/wiki/representative-hcard
Thanks,
Tantek
P.S. Nice hCard in your sidebar! See if you can broaden it to include your visible image higher up in the sidebar, as well as your description as a class="note" and your interests as class="category" rel-tags.