I took a gamble on the WD3200ME passport external drive having the WD Scorpio WD3200BEVT inside it, and the case being openable. The good news, It is and it is! And the whole thing only cost €89 from PC City in Spain. (including VAT!)
So if you want to put a fast big HD in your macbook or macbook pro this is the way to go. you get a SATA cady, and the fastest 320GB 2.5" 9.5mm 5400rpm drive for less than the bare drive costs.
To open the passport without wrecking it do the following
Good luck putting the drive into your macbook pro! Im going to get my local (2 hours drive away) Mac repair place to do it for 40 quid. That way it keeps the crap 3 year extended warranty.
The drive comes with some windows only SW. Great.