Nope, that drive is SATA according to Western Digital's web site. We've had discussions about it before - an error on NewEgg's web site.
Are you sure, Newegg isn't the only one with that product number and EIDE - WD3200BEVE. There have been some 320GB drives announced, but I've not found one actually for sale before today. And I tried pretty hard before I got my 250GB one (but haven't tried since). BTW, my 250GB still works great - don't plan to change.
I still have plenty of space on it. I was a little disappointed to find out that you cannot play Audible.com content on an AppleTV, but then again, I don't usually use ATV for music/books.
I still think the missing piece of Apple's product line is some sort of centralized home storage system. The Mac Mini is an interesting potential platform for that (or foundation of the platform). Some place where you could have lots of storage and some sort of backup capability.
Apple TV is another interesting potential foundation for a home server platform. Although it probably doesn't have enough umph! I wonder if my router isn't overwhelmed with a wired iMac, wireless notebook and desktop, iPhone, Vonage VOIP, and Apple TV. It all starts to add up!