How do I make Lion wake up when a USB device is plugged in?

I'm having this issue on a MacBook Air, but I assume it would occur on a MacBook Pro as well.
What I want to do is to use my MacBook with an external display, and have the lid open so I can use the keyboard/trackpad, but have the MacBook display turned off. There are two obstacles to doing this under Lion:
1. You can start the laptop in clamshell mode with an external display attached, but opening the lid will make it go out of clamshell mode and turn on the MacBook display, going into dual screen mode.
2. Since I don't have a wireless keyboard, the trick that I was using in Snow Leopard to wake up my MacBook was to plug in a USB device. This doesn't work anymore in Lion.
Issue 1 has been resolved by this post:
https://discussions.apple.com/message/16059565#16059565
But I'm still looking for a fix to issue 2. Any help would be appreciated!
PS The solution to issue 1 in the thread above recommends running this command:
sudo nvram boot-args="iog=0x0"
I would imagine there's probably some kind of command that will fix issue 2 as well?

Are there any web interfaces for LKML? I dislike mailinglists; the last one I subscribed to randomly stopped sending messages to me after about an hour. I might try usenet; there are some good-looking groups on there I think.
Also, I'm sure there has to be a way to do this outside of udev. I mean, if udev can be made to work without using like 30% CPU (which I'd imagine would be what would happen if it polled every 1 second, which is what I'd want it to do), I'll use it, but what about thinking outside the box a little?
I mean, my first thought was to write a kernel module that responded to dmesg at the kernel level; dmesg doesn't update all that often, and I could run through all the lines I recieve and look for, for example, my PCI ID and a signature telling me if it was added or removed. I just have no idea how to do that.
-dav7

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