Hot Blog Trends
Spotted on the loose seem to be three big things:
RDFWeb: FOAF: the 'friend of a friend' vocabulary. Most of the cutting edge folks are implementing this. I read the spec and literally can't tell what it is for.
Changeable blog skins. These mainly take advantage of CSS to flip different photos and themes onto a web site dynamically. Pretty cool.
RSS/RDF/etc. Lots of content oriented things where you can use structure reading of blogs.