ClickZ writes a great article examining whether QR codes will survive or become obsolete. I’m certainly on the fence with regards to this issue. While there are many great uses for QR codes, I’m not sure if user adoption is occurring at a fast enough clip.
SEOmoz.org published a great article about optimizing landing pages. I particularly found of interest the section on “looking where other people are looking”. That would make a great split test for your business and I highly suggest doing so.
I don’t use Safari, unless I have to… which usually means only when using Apple services like the iOS Developer Center so I can access my Apple Development account for making iPhone Apps (which I believe will soon too be obsolete).