I have tested this and now know it as fact. I have a launch iPhone 3G with the 2.2 software, NOT jailbroken. If I reset my phone and turn it back on, once every three times it completely disables my wireless network. When I mean disable, I'm talking that my LAN light on my Linksys router shuts off completely. I have to power cycle my router to bring my network back up again. It's EXTREMELY frustrating now knowing the culprit, but why in the hell does this happen?!?