Recommend a simple distributed messaging tool?

[C# Programming]

I'm looking for a simple tool to replace MSMQ, mainly because of the centralized, single point of failure nature of MSMQ. Currently, we have a web server farm and some of the sessions will have to communicate through MSMQ. The problem with this is that if the machine where the queue is defined is down, the messaging stops. Can anyone recommend a tool that is distributed among the servers so that I can send a message to a queue and if a session on another server is listening it will receive the message? The idea is not to be sending a message to a machine based queue such as in MSMQ, but more of a virtual queue that is alive as long as something is listening on it. I was hoping to find something like this so we don't have to write one ourselves.

Thanks
Brian