<p>We have been using GenuineChannels in our product for the last 4 years. GenuineChannels now appears to have become unsupported and the main developer guy Dmitri has I think joined Microsoft. I have the source as part of the product but not the networking / .net knowledge to support it.</p>

<p>Has anyone found a good alternative to GenuineChannels for good .net remoting? I need our software product to run on top of some supported software!</p>

WCF (Windows Communication Foundation) is the way to go - much more scalable, easily swappable to other technologies (if you need in the future), and builtin to .NET 3.0.
A lot of other nice stuff there, too...
http://msdn.microsoft.com/en-us/netframework/aa663324.aspx