Lorelle has a post titled Heads Up News on WordPress 2.3 about the upcoming release of WordPress 2.3, due September 24. I am especially keen on the new built-in tagging feature.
Lorelle also writes about Tags Arrive on WordPress.com Blogs. If you scroll down she mentions tagging in the full (hosted) version of WordPress. She also explains the differerence between categories and tags:
Categories are your blog’s table of contents. Don’t remove them, thinking tags are a better option. They aren’t. Your posts must be categorized. Remove them and they will be categorized as “uncategorized”, something you do not want, trust me.
Tags are like your blog’s index. They are keywords that represent the micro-categorization of your blog’s content. To work effectively, they need to be words that people search for, called search terms.
Aaron Brazell writes about 10 Things You Need to Know About WordPress 2.3. I like the new feature that handles Canonical Redirection (using only either www versions of blog URLs or non-www versions).
WordPress Codex has information about Plugins/Plugin Compatibility/2.3.
