Sierra Wireless on Wednesday released a pair of HSPA mobile broadband network ExpressCard modems, the AirCard 501 and 502. Either has the potential to download data at up to 7.2Mbps and upload at 5.76Mbps and sport internal antennas with no moving parts, which extend just over an inch from a notebook. The AirCard 502 is designed for use in the European market, as it operates on the 900MHz, 1,900MH
