Seattle-based PopCap Games reported today that it has hired on Robert Chamberlain as its Chief Financial Officer. Chamberlain joins from F5 Networks, and has also served at Onyx Software and Watchguard Technologies, PhotoDisc, ElseWare Corporation, MidCom Communications, and KPMG. PopCap says that Chamberlain replaces interim CFO Karla Horwitz, who is at interim CFO firm Tatum Executive services.