Uploaded a new version (0.4) of abook-qrcode to extras-devel. Plenty of new exciting features! :)
Now instead of saving the QR Code directly, you will get a nice preview QR Code image that someone can read directly from the phone screen. From the menu you have the option to Save or Share. Share uses the N900 sharing service so you can send the QR Code as an e-mail, using bluetooth or any configured sharing service like Facebook or Ovi.