The Wall Street Journal reports washingtonpost.com will begin asking users for gender, year of birth and zip code, starting today. It'll be voluntary until Aug. 14, when users will be required to enter the information to access news stories, the article says. Information will be stored in a cookie.
It'll be interesting to see how they pull this off, especially from an accessibility standpoint. What about users who have disabled cookies in the interest of privacy? Clearly they'll have to enter the personal information every time. What about Lynx users? Lynx has the ability to accept and save cookies, but they're not stored between browser sessions.
UPDATE, 7:47 PM EST: Here are some more resources: