Western Digital has also released a
2.5"
Scorpio Sata 640 gigabyte hard drive for laptops. I installed one in a HP model replacing a WD 160 gigabyte drive. The replacement process is physically very easy and the enhanced storage capacity has vastly improved the useability of the computer, enabling my entire photo collection to be readily available in a portable laptop. Best Buy had it on sale for $125.00 ($150.00 list).

WD Scorpio Sata 2.5" laptop drive:
http://www.wdc.com/en/company/releases/PressRelease.asp?release=8dc1174a-92a0-4db3-b0ac-58218b52a24dSolid State drives for laptops are still fairly costly:
http://www.google.com/products?q=solid+state+hard+drives+for+laptops&rls=com.microsoft:en-us&oe=UTF-8&rlz=&um=1&ie=UTF-8&ei=mmmMS63CApGKswPizYjQAw&sa=X&oi=product_result_group&ct=title&resnum=3&ved=0CDEQrQQwAgThe solid state drive is found in
rugged, "
field -ready" laptops (also costly):
http://www.dell.com/xfr?ST=state%20laptop&dgc=ST&cid=52499&lid=1360158&acd=58845,8,0,78885776,761856559,1267493661,,21469800,4629845530Solid state drives vis-a-vis
hard disk drives in laptops:
http://www.pcworld.com/article/134185/solidstate_drives_versus_harddisk_drives_in_laptops.html