WordPress automatic upgrade
Here’s a WordPress plugin that will automatically upgrade your blog to the new version quickly and efficiently. You’ll need to double check any plugins that you have running to make sure they work, and if not, remove them or find an upgrade for them.
I put WordPress 2.5 on another blog to test it out, so far I see no issues with it, at least nothing I can’t deal with. Hasn’t been anything major for me anyway. Of course, I’m not talking about a developed blog, either.
Get the WordPress automatic upgrade at: