this was a popular and informative post. it took me forever to dig it up to answer a poster's question as you can't find it through the search function. I tried to post a reply so it would come up on the new forum, but it wouldn't let me
http://www.techist.com/showthread.php?s=&threadid=115938&perpage=15&pagenumber=1
http://www.techist.com/showthread.php?s=&threadid=115938&perpage=15&pagenumber=1