It's been a hot minute since the folks at T-Mobile have introduced a new USB WWAN modem, but if the document above is to be believed, that could be changing in short order. As the Jet ages, it looks like a few others -- codenamed Kitty Hawk, Washington and Wayne -- could be swooping in to take things from here. The former is rumored to hit shelves in March, offering HSPA+ speeds of 21Mbps and the ability to solve most of the world's problems. As for Washington? That'll be T-Mob's first USB modem to offer HSPA+ speeds approaching 42Mbps
