Because the Postgenomic.com website has been rather slow for me (Euan, what is causing that? Too many users?), and upon user request, I start a series of Special Markup articles here, which will give the most up to date description of the supported markup.
Marking up Conferences
Conferences can be markup by using the @rel="conference" attribute for the <a> element. See an earlier blog item.
Marking up Articles
While the software will pick up most literature automatically, you can mark up a paper as being reviewed. Just add the @rel="review" attribute to the <a> element linking to the journal article webpage.
Marking up Molecules
This has been described in this earlier blog item. The softeware will pickup the markup for SMILES and InChI's.
Microformats
There are currently no microformats supported, but this is anticipated. For example, hCalender and hReview are likely candidates.