WiFi Troubles... DON'T install Mini Launcher
I was checking out other launchers yesterday and found Mini Launcher. It seemed pretty cool, has a sidebar that shows weather and recent apps and stuff... anyway, it killed my wifi. I did some research and found a thread on another forum about wpa_supplicant.conf being messed up. It said to delete it and reboot and a new one would be generated. I did. It did. Still didn't work. Uninstalled Mini Launcher and did it again. STILL didn't work.
So today I downloaded a stock rom from XDA, pulled the wap_supplicant.conf file and put it back where it was supposed to go. Bingo... wifi works flawlessly again. I guess this is more of a warning to you if you haven't experienced this before... and as a bonus, here is the file for you...