Yesterday we released the native Betfair App for Android. It's been a very solid few months of work to get it to this stage, and whilst we're aware that it doesn't have all the functionality of the site yet, we're working on getting the best possible product out there given the resources that we have.
What I would really like to hear is suggestions for widgets and improvements to the app. Whilst I can't guarantee that your comments will be implemented immediately, I'll certainly look at them and use my influence to get them addressed the best I can.
Anyway, here's the QR code: http://tinyurl.com/betfairandroid or visit http://market.android.com/search?q=pname:com.betfair.nativeapp on your Android phone.
Cheers,
Martyn
Lead Android Developer