Hi - I was checking on Amazon, and it seems there have been problems with certain laptops being unable to power portable drives like the WD passport. Does the 2007 MBP provide enough power via the USB port to power these portable drives or no? I plan on buying the $1544 MBP (last year's model, as the latest revision isn't revolutionary) - and was wanting to get an external drive for backup. I know that the Lacie Quadra would be better, given the FW800 connection - but I got 2 of them from Amazon and they both made horrible scraping noises. So I'm no longer keen on Lacie. I wish Quantum would make a comeback Plus I wanna stick to like 120GB - as I don't trust hard drives and like to keep DVD backups. And I'd hate to have a 500/750GB drive go belly-up on me - warranty or no, my data would be lost.