This article really just serves as some notes for multiple browser testing… I will clean it up later if I have time. 
http://tredosoft.com/Multiple_IE
(abandonware)
Issues with IE Conditional Comments
http://www.russellheimlich.com/blog/walkthrough-setup-multiple-ie-virtual-machines-on-a-mac/
http://www.microsoft.com/downloads/details.aspx?FamilyId=21EABB90-958F-4B64-B5F1-73D0A413C8EF&displaylang=en
http://lassauge.free.fr/qemu/
http://www.agileapproach.com/blog-entry/need-multiple-ie-clients-mac-linux-run-virtual-box
http://blog.ryanparman.com/2009/06/30/run-ie6-ie7-ie8-images-virtualbox-macosx/
https://browserlab.adobe.com/index.html?sdid=EWRNK&
Very sweet… free… only requires an adobe login. Tests for IE 6-8 XP, Firefox 2-3.5 on OSX and XP, Chrome 3.0 (XP), Safari 3 and 4.
http://www.webdesignerdepot.com/2009/03/microsoft-announces-superpreview-for-ie-browser-testing/
http://www.sitevista.com/
http://www.browsercam.com/
http://ipinfo.info/netrenderer/
http://browsershots.org/