User-contributed content has been around for a long time, in the form of
Usenet Newsgroups. Newsgroups are still around.
A newsgroup devoted to taxes is
You can search for key words using http://groups.google.com/
A new method of collaboration is called a "Wiki", made famous by
WikiPedia the user-created and edited online encyclopedia.
There is a Wiki devoted to taxes, created by Intuit, called taxalmanac.com
Edit Your Marketing PreferencesOnce you sign up with Yahoo!, you should edit your marketing preferences. Since this is a free service, Yahoo! will make money by selling the e-mail list to various partners. Therefore, you should check to see which categories of marketers will be sending you information, and opt out if you want. Review your Account Info, fill in all or part of your personal profile, and then click on Edit your marketing preferences
You can subscribe to mailing lists by sending a blank e-mail message to the following addresses. Your own e-mail address will be sent automatically as part of the message, and you will then receive a confirmation from the moderator of the group. There is no charge.