I will second the notion for Gilmer's.
Like Tom said, there is wood and there is knifemaking wood. Just because you find a burl, it doesn't mean it's a handle quality burl.
Dave- If you want to drive down to Gilmer's, you take I-5 south until you come to the HWY 405 exit.
As you come to the southside of the bridge, take Exit 30 (St. Helens) and get into the left lane as soon as you can.
Turn left onto Nicholi St.
Follow Nicholi until you get to 31st and Nicholi. It's a big red building on the corner, you can't miss it.
It's a pretty cool place to go. But the nice thing about Gilmer's is like Tom said, the guy there can mail you wood that won't dissapoint.
Just some info...
Nick