I watched the DNR TV episode with Glenn Block and it looks like MEF would be useful for my company. I am trying to find out more information on it's strengths and weaknesses and some sample projects that use it. Are there any good blogs/tutorials on using MEF?
Note: I use C#, so if the examples are in C#, that would be awesome.
I haven't found a really comprehensive page, but there are a few:
Microsoft Docs
Simple Example from a msdn blog
Code Project's Introduction to MEF (part 1)
MEF 101 part A from Geek with Blogs
MEF 101 part B
Another MSDN blog, a little more history than tutorial
Dependency Injection in .NET by Mark Seemann has a section on MEF, as well as Castle Windsor, StructureMap, Spring.NET, Autofac, and Unity.
Mike Taulty recently did a set of screencasts on using MEF in Silverlight, which should be a good introduction to MEF.
Microsoft Docs is a good start
Kathleen Dollard has some good materials as well
If you're looking for information on the latest version of MEF that is shipping with the next .NET Framework, the definitive source of information is the BCL Team Blog on MSDN.
(MEF is part of the .NET Base Class Libraries.)
I wrote this MEF demo article on CodeProject, and all the code is open sourced.