I wouldn't take Sharapova. Fed Cup and Davis Cup really are about team. That's why lower ranking players beat higher ranking players so often in those tournaments. (well, nationalism plays a big part too.) I'd take Myskina, despite her recent poor play, because she's always come through in Fed Cup for me. And then I'd consult her about the rest of the team. For me, second singles would be Dementieva. Probably take Likhovtseza and Kuznetsova to round out the team, since they both play doubles.
Proud to be an American
Not blind. Not uninformed. We are party to atrocities. But the response of the world after 9/11 is worth noting. Even our most dire enemies offered aid. We should all be so lucky.