iMac (2007-2009) Memory Installation Video - YouTube
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Maximum RAM iMac early 2008 | MacRumors Forums
Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 for Mac Book, Mac Book Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) SODIMM Memory MAC RAM Upgrade
A-Tech for Apple 1GB DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook, MacBook Pro, iMac, Mac Mini - (Early/Mid/Late 2006, Mid/Late 2007, Early 2008, Early 2009) - Memory RAM Module at Amazon.com
iMac Intel 24" Early 2008 EMC 2211 - used original spareparts for Macs