Lockfree hashtables

The other day I bumped into some ideas about lockfree hashtables.
Are these of any use in PostgreSQL?

http://blogs.azulsystems.com/cliff/2007/03/a_nonblocking_h.html
http://video.google.com/videoplay?docid=2139967204534450862

-- 
Sincerely,          Stephen R. van den Berg.
"I hate spinach, and I'm glad that I hate it, because if I wouldn't hate it,I would have to eat it, and I hate it!"