Ein sehr schönes Projekt ist Wikipedia over DNS.

Mit host oder dig sendet man eine Query an <suchwort>.wp.dg.cx und bekommt im TXT Record eine Zusammenfassung und den Link des Wikipediaeintrags.
$ host -t txt simpsons.wp.dg.cx
simpsons.wp.dg.cx descriptive text "The Simpsons is an American animated
sitcom created by Matt Groening for the Fox Broadcasting Company. The
series is a satirical parody of a middle class American lifestyle
epitomized by its eponymous family, which consists of Homer, Marge, Bart,
Lisa, an" "d Maggie. The show is set in the fictional town of Springfield,
and lampoons many aspects of the human condition including... http://a.vu/w:The_Simpsons"

Der Service funktioniert auch mit Umlauten. Mit dig am besten den short-switch:
$ dig südtirol.wp.dg.cx txt +short
s\195\188dtirol.wp.dg.cx descriptive text "The Province of Bolzano-Bozen
(\; \; Ladin: Provinzia autonoma de Bulsan), also referred to in English
as Alto Adige (from the Italian name) or South Tyrol (from the German
name S\195\188dtirol) is an autonomous province of Italy. In the Ladin
language Alto Adige " "and S\195\188dtirol are used.
http://en.wikipedia.org/wiki/Province_of_Bolzano-Bozen"