I downloaded it, Chet, and it is, as you say, a giant improvement over B3. \I've not yet printed anything that I've worked up with LR-B3, but I'll be interested to see if the very slight (red) colour cast is visible in the prints, as it was with B3 on my equipment, and which a number of folk raised on the feedback site.
Also, about being free: I think you and I understand that ultimately it won't be free since B3 was to expire (ie, B3 would cease to function) in Jan 2007 and I note that B4 on my equipment is to expire in Feb 2007, although when I wanted to double check this date I can't find where it is.
Ciao,
Doug