GUARDIAN.CO.UK - Mar 10 - Investors are pumping more and more money into web services that are heavily reliant on Facebook. Smartdate received $2.2m from investors to try and build its idea of using Facebook data as the basis of a matchmaking service. We know from a number of reports and internal estimates that Facebook itself is due to post somewhere upwards of $1bn in revenue for 2010. How many companies rely on Facebook to keep themselves going? The conservative estimate must stretch into several billions of dollars worth of business at least. Back in November, Electronic Arts bought social gaming site Playfish, in a deal worth ~$275m, meanwhile Zynga, another developer of popular games has already taken more than $200m of venture capital. Other companies making apps include Slide, Mindjolt and FriendFeed (bought by Facebook for ~$50m). FULL ARTICLE @ GUARDIAN.CO.UK