I managed to upgrade to WordPress 2.3. This is a pretty serious upgrade, and for the first time it comes with native tag support!
Because of this I also decided to change theme. After years of using the excellent and sober Blue Theme 1.0 by Alex King, I am tentatively switching to the Unnamed theme by Xu Yiyang. This is a great theme that greatly resembles the old Blue Theme while supporting the latest WordPress features such as widgets and tags.
Meanwhile, all the info you saw on my previous theme will be gradually migrated to the new, improved theme.
So far, I find the new WordPress very good. Upgrading is recommended.