Security experts believe the site served as a gateway for the recent attacks against Twitter, Facebook and Apple employees. The administrators of a popular iOS developer Web forum called iPhoneDevSDK confirmed Wednesday that it had been compromised by hackers who used it to launch attacks against its users. Facebook revealed Friday that its employees were also targeted in a sophisticated attack last month. Apple announced that a small number of its systems had been infected with malware on Tuesday, Apple said. The attack involved an exploit for a vulnerability in the Java browser plug-in that was served from a website for software developers.”]