Security software firm Kaspersky Labs says that mobile viruses have proliferated 10 times faster than their PC counterparts. In a report titled ''Evolution of Mobile Malware,'' the company says that there are now 31 families of mobile viruses that target smartphones, PDAs and WiFi-enabled devices. Each week this year, the company has added an average of 10 new Trojan Horse viruses to its database, primarily spread via Bluetooth or MMS. 10/7/2006 10:11:31 AM ---