Version 2.3 of WordPress, the blogging software I use to produce this blog (as well as the other blogs on my site), will be released later today. I'll be upgrading these blogs on Monday evening. There have been major pieces of WordPress that have been re-worked, and those are causing some plug-ins to not work correctly. None of my blogs are all that reliant on plug-ins - the “Share This” plug-in is the main one, and it's been verified in 2.3 already.
There's lots more information on the WordPress Development Blog - I won't go into the details here. I'm confident this will be a smooth upgrade. I just wanted to let you know in case some things look strange, I'm on it.