Western Digital Scorpio Blacks just came out. 320GB at 7200 RPM...
http://www.engadget.com/2008/06/02/western-digital-launches-7200rpm-scorpio-black-laptop-hdd/
surely nice, but 5400 is fast enough. also 7200 would drain the battery faster. and I've also heard stories with MB with 7200 drives which began vibrating there where the HD is. Hope this isn't true, but you never know.
@DoFoT9: you may also consider the Samsung 320 GB 5400 drive. Pretty much the same as the WD though. I bought the WD because it was a bit cheaper and I made good experiences with WD years. But other prefer the Samsung. So just look at the prices and maybe some reviews, though they weren't helpful for me.
And for people asking what I need "so" much space for on a notebook? It's my main and only machine I am using. On a tdesktop you would easily have 500 GB and more, so why not on a notebook. Do people with a 160 GB iPod have to need all of their music on the go? Maybe no, but it's nice to have. And for some people it is important.