I have tired everything to get bootcamp to work on my macbook (early 2009 model with lion) and yet I get the "No bootable device" error. I'm trying to install windows with my flash drive but it just won't continue past the reboot. Help, please.

I believe Windows USB thumb drive installs aren't supported on your system. You will have to install via Windows DVD.

If your computer has a dvd drive then you can not use a usb thumb drive to install Windows. Read and follow the Bootcamp installation help manual. http://www.apple.com/support/bootcamp/

I emptathise with your situation. This fix worked for me after a few hours of trying to get WIndows installed on my MBA. I decided to keep by OS X and repartitioned a segment on my drive for Windows. If you are having problems with a "no bootable device" against a black screen which subsequently hangs, try using a different USB thumbdrivve. An unbranded 8GB one didn't help, but a Verbatim 8GB stick one I had worked like a charm. I am not sure why as both thumbdrives were verified as bootable on my windows laptop.

It is NOT necessary to install windows from a DVD drive, I didn't have a drive and wasn't prepared to buy one just for this purpose.

This guide from CNET was very helpful:

http://howto.cnet.com/8301-11310_39-20020513-285/install-win-7-on-macbook-air-fr om-a-usb-drive/

I used ReFIT to bypass having to use an external hard drive which I also found unnecessary. Another problem I had was the MBA not detecting ReFIT options on restart. You actually have to do this a few times. I restarted it at least 4 times before it actually started detecting it, but it surely did.

Hope this helps....

I forgot to mention you also don't have to create a .iso of the windows DVD if you merely drag across the data onto the usb stick (ensure it appears EXCACTLY as in the disk, not in a directory on the thumbdrive or it won't work)