QR Codes via Google Charts API

Is there a convenient resource for decoding these? I took a quick look and ended up at

http://code.google.com/p/zxing/

but maybe there's something more convenient?

Edit: A few (non-phone) options:

http://zxing.org/w/decode.jspx

http://www.hafenscher.net/qrcode/

https://addons.mozilla.org/en-US/firefox/addon/2780