This issue has not caused nearly so much fuss on many of the other Tolkien sites I lurk on; but there was a small flurry of interest on Torn some time back.
http://newboards.theonering.net/foru...at+Mode#326938
One of the lawyers in the group gives an assessment of Hillaard's complaint, in a post titled 'I've read the cease and desist letter.
On the whole, I think the thread gives a well-balanced selection of views. The same can be said of the Wheelbarrows book - folk on other sites have discussed it in a reasonable way, including the book's other author, Neil Holford .
http://www.tolkienguide.com/modules/...ode=0&start=10