http://www.goldenson.com/?p=140 http://www.goldenson.com/?p=140 besides Adwords, twitter ,adWords, goog trends to put numbers on potential users/buyers/revenue

http://www.goldenson.com/?p=140 http://www.goldenson.com/?p=140 besides Adwords, twitter ,adWords, goog trends to put numbers on potential users/buyers/revenue (these are from searching HN on "market size": http://news.ycombinator.com/item?id=1454221 http://news.ycombinator.com/item?id=1454221 http://news.ycombinator.com/item?id=1476197 http://news.ycombinator.com/item?id=1476197 http://news.ycombinator.com/item?id=1581008 http://news.ycombinator.com/item?id=1581008