Google+ (GOOG) continues its viral growth, with Ancestry.com's (ACOM) Paul Allen estimating the...

|About: Ancestry.com Inc. (ACOM)|By:, SA News Editor

Google+ (GOOG) continues its viral growth, with Ancestry.com's (ACOM) Paul Allen estimating the site now has close to 18M users. It was only 8 days ago that Allen suggested the site had about 10M users. If Google+ can continue its rapid growth and keep its early adopters engaged, it may indeed take billions off Facebook's IPO value.