The Apple-focused blogosphere has been dominated this week by iPhone 3G reception and connectivity issues. Speculation as to the cause has been rampant, Apple’s not talking, and most — but not all — carriers are keeping their lips zipped, too. Meanwhile, the iPhone money train keeps picking up steam, ringing up $30 million in App Store sales in its first 30 days. So somebody, apparently, is getting enough connectivity to download and install a lot of iPhone apps.