Because of out proximity to the affected area I thought this would be relevent information.
http://www.vdacs.virginia.gov/news/releases-b/072111tcd.shtml
http://www.vdacs.virginia.gov/news/releases-b/072111tcd.shtml
This should increase the number of local portable saw mills, which might in the long term drive down prices for other woods.My supplier has told me the quarantine in northern states is only for raw wood and the raw wood can't be moved out of the county it is cut in and has to be kiln dried in that same county. Once the wood has been kiln dried, there is no problem with the canker spreading.
This is a serious problem and will only drive the cost of walnut up.
California, Oregon, Washington, Tennessee already has a ban for the whole state for green log or lumber. Unfortunately people will not abide by the regulations and it will continue spread despite the band aid application of quarantine. The same issue is happening with Emerald Ash borer which is why ash is so cheap at this time and in years to come will be very expensive. The same thing will happen if a large outbreak occurs, walnut will become cheap then VERY expensive.
http://www.fs.fed.us/foresthealth/fhm/sp/tcd/tcd.shtml