A number of IoC containers have Silverlight versions - Ninject and Unity especially seem to have healthy Silverlight offerings. Silverlight 2.0 is a variant of the .NET runtime, so this isn't too surprising.

Thanks to Tyson Stolarski and Rinat Abdullin, Autofac recently joined their ranks with a Silverlight-compatible build. (This one is hot off the press, so test it thoroughly before you set out to build anything mission-critical :))

MEF hasn't released any concrete plans for Silverlight, but experimenters can probably coerce the Codeplex source into a compatible build by hacking the .csproj file.

If you're reading this blog and use IoC on Silverlight in one form or another:

• What have your experiences been like?
• Do you use IoC in the UI, the 'back-end' or both?
• Does loose coupling/runtime composition get in the way of XAML-based designers?

I'd love to hear your thoughts!