OQO updates it's Windows XP PDA and calls it OQO 01+.

The OQO 01+ features upgraded memory, larger hard drive and faster USB. Additionally the model 01+ incorporates an internal speaker and improved pen-based digitizer. The OQO 01+ now ships with a new universal power supply which adds support for airplane and automobile DC power outlets.
If you want to own a Windows XP 'pocketable' computer than you need to pay $1,899 for the OQO with Windows XP Home and $1,999 for the OQO with Windows XP Professional.

We reported about the OQO the first time in July 2002. The OQO got delayed quite a bit and finally was shipping in 2004. OQO also introduces today several new accessories including a VGA adapter, battery charging adapter, and stronghold hard-anodized metal case all compatible with both model 01+ and model 01 computers.
More details on this OQO press-release.

OQO 01+ Specifications:

• 1GHz processor
• 30GB hard drive (shock-mounted)
• 512MB RAM
• 4.9" x 3.4" x .9"
• 14 ounces
• 800 x 480 W-VGA 5" display (indoor/outdoor readable)
• 3D accelerated graphics with 8MB video RAM
• QWERTY thumb keyboard with mouse buttons and TrackStik®
• WiFi®
• Bluetooth®
• USB 2.0
• FireWire® (1394)
• 3.5mm stereo headphone jack
• Microphone
• Pen-based digitizer
• NEW support for screen rotation
• NEW support for network boot (PXE)
• Removable lithium polymer battery
• Battery life up to three hours, depending on usage