The engineers over at Toshiba have announced the first 250GB 1.8″ hard drives:
IRVINE, Calif., Sept. 24, 2007– Toshiba Storage Device Division (SDD), the industry pioneer in small form factor hard disk drives (HDDs), today announced expansion of its market-leading 1.8-inch lineup with the MKxx29GSG series which include three new high-capacity, high performance Serial ATA HDDs [...]

Hard drive manufacturer Fujitsu announced they are releasing new 2.5″ hard drives with 320GB of capacity and a 7200RPM spindle speed.  From Fujitsu’s press release:
Fujitsu Computer Products of America, Inc., a leading supplier of innovative computer products including hard disk drives, peripherals and biometric security solutions, today announced the release of its 2.5-inch 320GB 7200RPM [...]

Hard drive manufacturer Hitachi announced today they are releasing new 320GB capacity TravelStar hard drives usable in both laptops and high density server applications.
Bolstering Hitachi’s position as the segment and technology leader in 2.5-inch hard drives, the company today announced volume shipment of new 5,400 RPM notebook hard drives with a maximum available capacity of 320GB. Designed to [...]

The folks over at Anandtech have posted some early test results of the new Caviar SE16 320GB hard drive from Western Digital.  This latest revision gets 320GB onto a single platter, rather than the pair of 160GB platters in the older model.
Western Digital has been quiet on the performance front the past several months as they have [...]

If you need yet more storage for your laptop, Fujitsu is bringing out a 500GB 2.5″ hard drive in May 2008:
Fujitsu Computer Products of America, Inc., a leading supplier of innovative computer products including hard disk drives, peripherals and biometric security solutions, today announced the release of its 2.5” 500GB¹ 4200RPM SATA hard disk drive [...]