There is a company up my way called Letourneau Land Clearing that does pipeline work all over the country. They have a bunch of cool youtube videos on their website showing their equipment and projects.
Cat- not sure yet. We might have an opportunity coming up in the new year to get into a material yard with a lot of big wood to grind that I'll need a bigger grinder to process all the material.
Kepple- sounds like that does put out some good material! Grab some pics when you can- I'd be interested in seeing what you have going on.