It's just a matter of time before hackers create spyware and viruses that spread like wildfire on our smartphones. Apple is probably in the most enviable position since they control all the apps that can be installed on the iPhone thru their iPhone app store. Since the number of people who jailbreak their iphones is quite small, this means Apple's user base will be protected. But for Android, where there are several unpoliced marketplaces, it's probably more dangerous. I'd check out security offerings from Eset and AVG before spending money on a security app from an unknown developer. It's only a matter of time before someone generates a trojan horse for the mobile phone market.