Couldn't post a reply on Daves site so thought i'd post one here. Here
is post:

http://blogs.pragprog.com/cgi-bin/pragdave.cgi/Random/Imitation.rdoc

I think this is happening a lot. 37signals has been ripped off
according to DHH (I believe), rails has inspired many 'best ever, just
what you were looking for' web frameworks. I think it is a fact of
life. Selection of the Fittest in action. The unworthy will surely
perish as they always do.