There’s quite a bit of uncertainty as to when Windows Phone 7 devices will be available in the US.
According to Paul Thurrott’s source, Microsoft will be making the devices available November 8 onwards. The European launch and availability has been slated for October 21st. Paul says (he’s no Octopus) the 11th October event in New York City is unrelated to Windows Phone 7 launch.
AT&T’s commercials for the devices have surfaced on the Internet quite in advance.