I've just released a flurry of updates for Rails. There's a new release of the main distribution, which now works on Windows out-of-the-box and has a WEBrick-based internal web server (you can of course still use Apache). Both Active Record and Action Pack have also seen updates, which includes new features and bug fixes.
I've also worked hard to cure all the start up problems people were experiencing with the 0.5.0 release. There's better error reporting and better documentation to help everyone out. And if that shouldn't put you on straight on Rails, the IRC channel has been growing rapidly. There's plenty of people willing to help you out.