The Sony Ericsson's flagship phone, the Xperia Arc, has quietly made its way onto Sony's US store, priced at $599.99. There's no mention of any specific carrier, but the specs list it as running on AT&T's 3G bands -- 850MHz/1900MHz/2100MHz.
This will be the first opportunity for folks in the US to (officially) get hold of an Arc that'll play nicely with a domestic carrier's 3G network. The phone has been available in Europe since April, but imported units are limited to 2G connectivity over EDGE in the US. Right now there's no mention of the Arc on AT&T's official site, so for the moment there's no carrier-subsidized option for this device.
Hit the source link for more information and specs, and make sure to check our full review of the Xperia Arc if you're thinking about snapping one up.