How to reset USB port after too much power draw message

Hi everyone,
I have the brand new MBA which I use for work and I tried connecting a USB hub yesterday to it.  Once I did the computer immediately shut itself off and after doing some HW troubleshooting for a bit, I unplugged, got back running and saw the error message:
I have done all sorts of reading online and just can't get my USB ports to work at all anymore.  I've tried plugging in my apple keyboard directly to both ports, and tried memory sticks but no luck.
Beyond that I have tried the steps for resetting the VRAM (or whatever it's called) and tried an SMC reset (though for that one there are several sets of differing keystroke instructions).  I have also had the computer "unplugged from power all night (and in sleep mode) but nothing.
Can anyone please help me?  I am fairly computer savvy so do want to try quite a bit more before I take it to an apple store as I just don't have time to deal with it.
Thanks

i had the same problem after leaving my macbook pro overnight with the printer cord plugged in. even though i had unplugged the printer, computer still showed the message. suggested reset didn't work. but what did work was:
1) shutting down computer
2) turning printer on and reconnecting to macbook with macbook still off.
3) powering up macbook
4) removing printer USB cable AFTER macbook fully booted up.
voila, no more message, all USB ports functioning!

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