Exploratorium Magazine Online, the Evolu - origins and development of language. There are audio clips by a linguist about how language is studied and classified. You can see how words from different languages are related. Be sure to investigate the "Try This" sections for interesting act
Online Slang Dictionary - This dictionary has been written as tastefully as possible, but some language might be offensive to some readers.
The Pun Faqtory - the unofficial FAQ (Frequently Askewed Questions) listing of the alt.humor.puns UseNet newsgroup. It is intended to be a reference to the most commonly asked questions and basic information about the Art of the Pun.