My friend Steve has been using the ILOG Rules for .NET product (which you can now download for an extended trial as I discussed here) and has written a nice little review of it - Lab test: ILOG Rules for .Net meshes well with Microsoft. There’s a lot to like in the .Net version of ILOG’s product and I, like many others, am waiting to hear what IBM’s plans for it will be when it finishes acquiring ILOG.