P> Plenty of blogs report D. Thomas and crew immersed some of you and let you
P> write a Web server in under an hour.

P> Nobody has left a result of this experience on the 'net. Could someone post 
P> it here, please?

P> I'm not asking because I'm lazy to learn Ruby, I'm just lazy to learn how 
P> Web servers work. ;-)

Have you seen:
http://www.xs4all.nl/~hipster/lib/ruby/httpd

The newer version:
http://www.xs4all.nl/~hipster/lib/ruby/httpd-1.6.1.6

also:
http://www.ruby-lang.org/en/raa-list.rhtml?id=542
http://www.ruby-lang.org/en/raa-list.rhtml?id=631
http://www.ruby-lang.org/en/raa-list.rhtml?id=54

regards,
-joe