Any laptop of the right thinkness and ATA speed should be fine.  There shouldn't be any real reason to look for HP specific drives as it seems it takes a fairly standard 9.5mm drive.  Faster spindle speeds will help performance, but at the expense of battery draw and heat.  If it's one of those hot P4 monsters, I'd be a tad wary of using a faster/hotter drive than spec.  Otherwise, if it's a Pentium M, then the heat output should be less worrysome.

On 12/30/05, crash3m <crash3m@gmail.com> wrote:
I believe there are 3 sizes of laptop hard drives, the main difference
is their thickness, and the amount of power they draw.  Search
pricewatch.com.  I saw a 80G 4200RPM, toshiba drive, 2.5"x9.5mm, for
$112, from memorylabs.com...under details "for ..... hewlett packard"

Matt