There are other sites and organizations that may be of interest to puzzlers. These include:
An NPL member, Xyzzy, maintains a site that provides help on how to use the Merriam-Webster online Collegiate Dictionary.
There is a site that is devoted to the yearly crossword competition at Stamford, which many NPL members attend. That site also contains a page of links which you may find interesting. Another recently created site is Puzzability, two of whose three creators (G,Ames and Manx) are members of the NPL. Jed Hartman maintains a wordplay page called Words & Stuff.
Ray Hamel's home site contains a page with hundreds of links to crossword puzzle sites, and includes an excellent quote from 1929 about constructing crosswords.
Sue Gleason's website, www.doublecrostic.com is dedicated to online acrostics. A challenging puzzle by NPL member Panache is currently (was?) featured (Oct 2003).
A Collection of Word Oddities and Trivia is a compilation of odds and ends, such as the longest word in various languages, and words which derive from people's names, such as shrapnel.
Puzzle books freely available online:
News groups are part of a system called Usenet. They carry, amongst many other topics:
You may also be interested in information on how to search the rec.puzzles archive. This is a repository of definitive solutions to classic logic and other puzzles, such as the one about the farmer trying to get a goose, some corn, and a fox safely across a river in a small boat. You can download an index file listing all the items, or specific items, from any of the “mirror” sites around the world.