Kernow is a great tool for people that isn't used to the command line. I use it all the time in my XML class (that I teach at college). The only missing part is the XQuery equivalent of the "Single File Transform". Could you consider adding it? If you don't have time, I can write a patch (if I know that you plan to add it).
Regards, Hans Nordhaug
PS! I'm sure I have asked about this before, but I just can't find it Maybe in your blog?