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tedster - 8:42 pm on Nov 10, 2007 (gmt 0)
Technically speaking, StumbleUpon inserts the additional information in the underlying Web page code with no special effort from users. Yahoo! News story [news.yahoo.com] Here's another bit: "To identify their friends, StumbleUpon asks them to allow StumbleUpon to troll through their online address books such as Outlook or Yahoo or Microsoft or Yahoo e-mail to locate other StumbleUpon users. Privacy is assured, company officials said." No mention of gmail so far.
SearchReviews are available to StumbleUpon users who have downloaded and installed the company's toolbar inside their Web browser... These ratings will begin running on nine of the Web's most popular Web sites on Tuesday, including any links friends have reviewed on search sites from Google, Yahoo, MSN, AOL or Ask...