Eu trabalhei com o MQ Series da IBM. É Java e é bom pra caramba só que custa os (dois) olhos da cara. Mas ele tem um monte de wrappers para suas APIs, inclusive para .NET. Eu mesmo fiz vários sisteminhas em C# que criptografam as mensagens e mandavam para o MQ.
No meu caso, o MQ era usado para envio de mensagens entre bancos.
--
Daniel
"Let us change our traditional attitude to the construction of programs. Instead of imagining that our main task is to instruct a computer what to do, let us concentrate rather on explaining to human beings what we want a computer to do." (Donald Knuth)
"Yes, technogeeks can be funny, even if only to each other." (
http://www.boogieonline.com/revolution/science/humor/)"
"Man is driven to create; I know I really love to create things. And while I'm not good at painting, drawing, or music, I can write software." (Yukihiro Matsumoto, a.k.a. ``Matz'')