I'm still trying to decide between a button vs. skyscraper on the left. Otherwise I think my ads have been placed very well. http://www.ringercentral.com
Skyscraper all the way. Also, try to enlarge the width of your site and throw a 728x90 in there. Also..isn't this just an exact re-post of this thread ... http://forums.digitalpoint.com/showthread.php?t=91348 and this one ... http://forums.digitalpoint.com/showthread.php?t=91292