I was just going to make a post about this. You could also use Googles free QR generator.
Here's an example.
Code:
http://chart.apis.google.com/chart?cht=qr&chs=350x350&chl=market%3A%2F%2Fsearch%3Fq%3Dpname%3A{param}
You would just need to put your package name. This would be perfect for developers.