Last week I attended a presentation at the Visual C# user group in Israel. The topic was MSMQ use for connecting applications. The presentations was given by Yoel Arnon - who was part of the original team that implemented the first versions of MSMQ at Microsoft(based in Israel) .
Yoel proved he knows his stuff and showed some very cool demos. Personally I felt the presentation could have been done even more interesting that it was but it certainly gave a good idea of what coolness could be achieved using MSMQ and .NET.
As an aside, Yoel's blog looks to be a great resource on everything that is MSMQ, and I'd recommend it as a favorite for any technical savvy developer who wants to get into internals on this issue.