OK, I have a 13" MacBook Air (2010) and the latest version of MyWi (4.5.1) on my iPhone 4 (4.2.1/greenpois0n jailbreak). I was able to complete the initial pair with my iPhone 4 and my MacBook Air, but whenever I then try to initiate the connection from my MacBook Air to my iPhone 4 after that, my laptop says says "The Bluetooth network is unavailable". No matter what I do, after the initial pairing I can't connect at all. And of course, Bluetooth tethering is toggled on in MyWi. I even tried going to the Advanced Bluetooth settings in MyWi to change the Bluetooth Bridge DHCP Network to no avail. USB and Wi-Fi tethering work just fine. Any ideas?