Workaround for Mavericks Bluetooth/Wi-Fi interference? I have this problem: I normally have Bluetooth enabled so I can make use of my speaker system and Magic Trackpad on my mid-2012 11" MacBook Air (2.0 GHz i7, 8GB).  

However, when it's enabled, Wi-Fi association does not complete well, either on boot or wake from sleep.  In my case, the Wi-Fi icon in the menu bar oscillates a bit and generally gives up.  Clicking the icon again may or may not show my network; if it does, I can click it and it will usually associate, though occasionally it complains that association failed.  This happens on all networks I regularly use—one, a Buffalo AP, the other, a Linksys.

If I turn Bluetooth off, I can associate just as quickly as I ever have with no issues.  I generally don't even see it trying to associate; it's done before I'm logged in.

This appears to be a Mavericks problem, as the folks in the linked Apple discussion are speculating.  I know I never had it under ML.  Unfortunately, I don't know exactly when I started having the issue, but it seems like it became prevalent around the time I bought the Magic Trackpad.  This seems odd, though, since the Trackpad is tens of miles away on one of the networks I'm having issues with.

Is there a workaround that would allow me to leave Bluetooth enabled so I can much more easily use my Trackpad?
After digging in the aforementioned Apple discussion, I discovered at one point that an Apple technician recommended to one of the participants that they should remove their com.apple.Bluetooth property list.  I did so:

$ sudo rm /Library/Preferences/com.apple.Bluetooth.plist 


and rebooted.  When the reboot was complete, Wi-Fi was working flawlessly with Bluetooth on.  I lost pairings to all my Bluetooth devices except my Magic Trackpad.  I added back my speakers and all remains well 24+ hours later.

UPDATE: Adding my portable speaker seems to have been the straw that broke the camel's back.  Had to repeat these steps and then leave it unpaired to keep Wi-Fi working.