Same here
I had the exact same scenario. I thought i was still good, until i tried to actually use it... then poof.
i just upgraded to 3.1.2 and still had the tethering option but i connected it to the USB cable it went away - sigh. at least mywi works great.
I had the exact same scenario. I thought i was still good, until i tried to actually use it... then poof.