I've been having problems with my reception today while I've been in my dorm room. I've never had problems with reception in my room after being in my room for about a month, and I've always had full 3G bars on my iPhone 3G. As of recently, my reception will go from full 3G bars to full Edge bars to "Searching..." and then a frequent "No Signal". I'll usually have full bars and then attempt to send a message, but I'll lose signal. Here's what I think the problem is though: I attend the University of Texas at Austin, and there is a UT v. Texas Tech game going on right now. My dorm room happens to be right next to the stadium, so I assume that all those people might be bogging down the tower that is nearby. But I'm not really sure how those towers work.