Expensive, but very good service world wide. You can register it in the UK and get local number access in a sizable chunk of the world. They used to be IBM net. See http://www.att.net Also, don't forget about AOL! I know, I know, but the fact is that they are cheap, can be registered in the UK and have local numbers in the US. Don't expect to connect first time though.
Try this link.
Expensive, but very good service world wide. You can register it in the UK and get local number access in a sizable chunk of the world. They used to be IBM net. See http://www.att.net
Also, don't forget about AOL! I know, I know, but the fact is that they are cheap, can be registered in the UK and have local numbers in the US. Don't expect to connect first time though.