I just bit the bullet and upgraded to Rails 2.0, and so far I'm very happy, development views are generated much faster.
I only needed to change a couple things, my acts_as_authenticated plugin had a "redirect_to_url" that stopped working, and some "link_to" with a nil object as the object to the link also gave me some problems.
I was happy to see that all my .rhtml files still kept working even though Rails 2.0 might prefer me to use "file.rhtml.erb".
