Sierra Wireless today announced the Sierra Wireless AirCard 875U USB modem will be available from AT&T, offering high-speed BroadbandConnect network connectivity in a small, easy-to-use device that connects to a USB port. Like the Sierra Wireless AirCard 875 LaptopConnect card, the AirCard 875U USB modem offers tri-band UMTS/HSDPA connectivity, making it compatible with mobile broadband networks worldwide, with data speeds up to 3.6 Mbps (megabits per second). The new USB form factor allows AT&T to extend wireless service to computers without PC card slots. The Sierra Wireless AirCard 875U USB modem will be available May 7 from US$49.99 with a two-year contract and mail-in rebate. The new modem supports both Microsoft Windows and Mac OS X. [Link credit Macworld]