IronRuby and ASP.Net MVC
As these two ventures mature, I believe some really great projects will emerge. One project that has unified the Ruby/Rails community is RubyGems. I strongly believe that we need a similar package manager. There has been some talk of this kind of project, but I haven’t seen anything significant yet.
The best of what comes out of these projects will not necessarily be the ability to run Ruby on Rails or imitate it, although running it will be a great milestone. The real action will be from idiomatic home-grown projects.