As long as we're off topic, I'll take this opportunity to link to
my own image search engine demo, which unlike Google, performs image
query by content!
http://f.neonap.net:8080
Clearly, it's not as useful as Google's (it doesn't even run an
RDBMS!), but I think it has potential. See the page for more details
on how it works (i.e., who I stole my ideas from) and what its
limitations are.
