IBM MQ Custom Channel
I just saw a mail introducing an alpha release from IBM - an MQ series custom channel. It appears to be early stage, so don't throw this into production yet.
Several have asked me if it's possible to connect WCF to MQ - my answer is yes, but it requires a fair amount of custom code. If this channel makes it to a full-fledged release from IBM, you won't even have to do that.
Here's the link: https://www.alphaworks.ibm.com/tech/mqwcf/