Quiet a few of our members use smart phones, many of them Android phones I've heard several of them comment on being careful to only get apps from Google's Store. This article show that just because an app comes through a major store it doesn't mean that it is safe.
I know that in the PC world free game software has often been used to slip in Trojans which assist the bad guys in doing things like identity theft. Looks like the same is true in the Android world and I suspect in several others too.
That is one reason that it is a good idea to have good security software installed. Back in August ZDnet published a review of 30 Android security packages. Here is a link to it.
W.C.