This tool looks nice from what I have seen on their site. I have not tried it out yet, but it does appear to be created in .NET. If you are looking to make wood textures then it might be nice to give it a whirl and see what you can make that you like.
Also...it would be nice to hear other peoples opinions of it, so if you have tried it or once you have tried it if you want to try it. So feel free to post here about the program, share information, ideas and other things about this program.