David Leadbeater has set up a DNS server that answers queries to WikiPedia via the DNS! Look:

$ dig +short txt ldap.wp.dg.cx
"The Lightweight Directory Access Protocol, \
or LDAP , is an application protocol for querying\
and modifying directory services running over [...]"

(Replace ldap by the WikiPedia entry you want to see.) Cool. And very fast. And it is cached. I can also query via TCP if I prefer. via.