His official site can be found Here. He's got some nice art up there, but it's only the tip of the iceberg, really. He's only got a fraction of his art displayed there.
Anyways, this thread is really just an excuse to show off some of the sweet art he's sketched in the front of several of my books.

Ork Decker - The first sketch he did, this is a really sweet looking Ork Decker he did at GenCon 2005 when SR4 came out in the front cover of my original SR4 book (regular edition).
Troll - This one's a little harder to see, as it was done in pencil. Klaus stole my SR4 LE from me overnight and put a little extra detail into this one at GenCon 2006.
Dwarf Sammy - A pic Klaus did this year in my Augmentation book. I'm not sure how long this one took, as people kept coming up to him as he tried to start this pic, so I told him he could work on it whenever he had time and left it with him for the day. He's a great pic, with some good detailing. He asked me what to draw, and since it was for Augmentation, I figured Dwarf (Since I hadn't seen him sketch any Dwarves lately) with a Cyberarm.

Hopefully, I'll remember to bring Street Magic next year, and get him to do something up in there, Arsenal, and Unwired (assuming he has the time and energy

So, any of you GC goers get any nifty sketches you want to show off, or anyone else have any favorite pieces he's done in the SR books?
Bull