Google checkout is the thing keeping me from buying apps. I've been close to buying apps a few times, but then I have to go through the hassle of setting up a Google checkout account on my phone and decide that it's not worth it just for some app.

What Google really should to if they want to get people buying apps is to make a deal with the carriers so that apps I buy show up on my phone bill. If they did that then there would be no barrier at all for anyone to buying apps and I no doubt would have bought several by now.