>Does anyone know of public domain dictionaries of common words? I want to add a spell check function to some Web Connection Applications, so I'm not looking for a 3rd party product based on a Windows UI. I don't want licensing issues, should I decide to deploy any of these apps as vertical market web server products.

After you find the list of words, you can make your spell checker really nifty using this:

http://www.developersdomain.com/vb/articles/soundex.htm