Dell Wednesday rolled out new notebook computers that are based on Intel\u2019s Core Duo processors and add new wireless connectivity and security features.On the wireless side, the new notebooks\u2014the Dell Latitude D620 and D820\u2014add optional built-in connectivity to wireless broadband technology. Businesses can choose among cellular carriers such as Cingular Wireless and Verizon Wireless in the United States\u00a0and Vodafone Group in Europe.Although connectivity to 3G (third-generation) high-speed networks is still limited or not available in many cities, the laptops support Verizon\u2019s EVDO (Evolution Data Only) and Cingular\u2019s HSDPA (High Speed Downlink Packet Access) data transmission standards. Cellular modems cost\u00a0about $200, plus the cost of service plans.The new broadband option is appealing to Michael Haga, regional network medical director for Care Level Management, a health-care group based in Woodland Hills, Calif.,\u00a0which provides physician house calls for elderly patients. "We\u2019re excited about the integration with mobile broadband. We\u2019ve had so many cards smashed into PCMCIA slots, so this will reduce the need for support and allow us to connect in patients\u2019 homes at the point of care," Haga said.The notebooks, which also have built-in 802.11b\/g wireless connectivity, add a new feature called the "Wi-Fi Catcher" that helps users detect available Wi-Fi hotspots without booting up their machines.On the security side, Dell added an optional biometric fingerprint reader for businesses looking for an additional tool to protect their data.The D620 weighs approximately 4.4 pounds (1.9 kilograms) and has a 14.1-inch (35.8-centimeter) wide-aspect XGA (Extended Graphics Array) display. The D820 starts around 5.6 pounds and has a 15.4-inch wide-aspect XGA display.The D620 is priced in the United States\u00a0starting at $1,149, and the D820 starts at $1,289.Dell also took the wraps off two mobile workstations with high-performance graphics support. The Dell Precision M90 and M65 workstations are also based on Intel Core Duo processors and include optional, built-in mobile broadband support. The M90, with its 17-inch wide-aspect display, starts at $2,239, while the M65, with a 15.4-inch wide-aspect display, starts at $1,849.-Shelley Solheim, IDG News ServiceFor related news coverage, read Dell Snaps Up Alienware.Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.