Integrating your Web site with social services is easy! With Free Social Media Icons, Web developers get 68 unique icons representing popular social networks such as Facebook, ICQ and Twitter. Images for Amazon, Digg, Podcats, Yahoo, YouTube, Google, Apple, AOL, MSN, Smile and more are also included. Free Social Media Icons also include glossy templates to help you produce additional images you might need for your website, forum or applet.
More quality vector and raster icons are here: http://www.aha-soft.com/iconsets.htm