Sony Ericsson today finally detailed the US release of the Xperia X1, its first full touchscreen smartphone and also its first Windows Mobile phone. Rather than tie the phone to AT&T, the cellphone maker instead says the X1 will sell through its Sony Style website as an unlocked device for $800. The move lets users pick AT&T to gain full access to the phone's HSPA-based 3G or T-Mobile if they pr
