According to Car and Driver Mag, the last Alfa to be sold in U.S. was the late Spyder, the one that dated back to the sixties (it appeared on that movie, "The graduate"). Since then, Alfa has not considered returning to the states for many reasons, one of them being that small sports hatchbacks and sedans are not exactly america's best-selling automobiles. It is known, though, that wealthy guys have imported some Spyders (the newer models, which are the most strikingly beautiful convertibles I've seen)
But I may be wrong. Some time ago I heard about Alfa planning a comeback, but since then no news.
On my side (I don't live in the States), I'm considering my next car will be a 147 hatchback with a 2.0 engine and, of course, the Selespeed gearbox, the best gearbox available this side of a Ferrari Modena F1Style. My beloved Golf is getting a little bit outdated, and I like new cars (and I'm sinlge, so I don't need to discuss this kind of acquisitions in a comitee, heheh)