I am nearing completion of a carbon version of my application. In order to use the "built for OS X" badge you must be able to install without classic. Shame since I bought VISE Lite and it's only classic. The carbon version of VISE is a litle pricey for me so I have been ooking at alternatives. 
Installer Factory and MacInstallerBuilder. I have experienced bugs in each but so far MacInstallerBuilder seems to be the best choice. I have also thought about making something in FB using some applescript but I'd probably create more bugs than I am geting with these commercial applications.
Are any on the list using commercial installers and what do you like?