Just read this article regarding how Apple may very soon release iOS 4.01 to alleviate the reception issues. It said they may do this as early as next Monday! Just wanted to pass this along to whomever hasn't seen it yet!
http://www.appleinsider.com/articles/10/06/25/death_grip_hysteria_may_end_monday_with_ios_4_01.html
http://www.appleinsider.com/articles/10/06/25/death_grip_hysteria_may_end_monday_with_ios_4_01.html