Say what you will about Apple’s closed environment in the App Store, and the arcane approval process, but fraudulent apps are much less likely. From First Tech Credit Union:
We recently learned that a fraudster developed a rogue Android Smartphone app. It creates a shell of mobile banking apps that tries to gain access to a consumer’s financial information. Droid09 launched this phishing attack from the Android Marketplace and it’s since been removed. It’s called phishing because scammers go fishing for information about you or your financial account that may be used for identity theft. If you did download the Droid09 app, please remove it from your phone and take it to your mobile provider to ensure it’s completely removed. As a reminder, we don’t currently have an app for the Android phone.
Expect more of that kind of activity as smart phones grow in popularity and usage.