As Smartphone's become more and more popular so does the threat level from Malware and other nasties, more akin to your PC or Laptop Computer.
According to John Hering, chief executive and founder of mobile security provider Lookout;
“Scammers are distributing apps for Windows Mobile-based Smartphone's that have malware hidden inside that makes calls to premium-rate numbers across the globe, racking up expensive bills unbeknownst to the phone’s owner,”
John says that apps;
3D Anti-Terrorist game, PDA Poker Art, and Codec pack for Windows Mobile 1.0 are being distributed on as many as nine popular download Web sites, including DoDownload, GearDownload, and Software112, Someone has copied the programs and repackaged them with the malware inside,