IronRuby release (extending DLR support)
Ruby is a dynamic language from Japan (mid 90's). The framework gain popularity (with help of rails) in web developers(data driven sites) community because of it's slim (less code) and fast (less time) development rate (achieved by code/db conventions used in during the development).
In order to support ruby on the .NET platform Microsoft developed DLR - Dynamic Language Runtime. A special layer for dynamic languages such as python(already available), javascript, vb and ruby. The layer supports the sharing of objects between the supported dynamic languages (like CLR for C#,VB.NET and etc).
According to John Lam Iron ruby will be available at OSCON (end of July).
More about DLR can be found on codeplex.