I released an installer the other day on GotDotNet for WSMQ, http://workspaces.gotdotnet.com/wsmq.  Although there's an installer, it's really Alpha code...  I decided to go ahead and release an installer anyhow.  I've been using this instead of MSMQ for about a month in a production environment, and it's working pretty well.

So what is it?  WSMQ is a message queuing application with a Web Service endpoint.  This can be really useful for a lot of situations where a service-oriented, standards-based queue is needed.  The underlying queue is serialized to disk using XML, so it's open to management hooks in the future... I'm working on a queue manager now, but it's on a back back burner. 

Currently, you can queue and receive xml serialized messages as well as dynamically creating queues. There's no support for transactions, triggers (obviously) or private queues. 

I'm going to do a few blog posts on how to install and work with it in a bit.

-Brendan