As reported yesterday the new dual boot Acer Aspire One D250 is already available for pre-order on Amazon. Just now Acer made the dual boot Acer Aspire One AOD250 netbook official.
The 10.1-inch Aspire One AOD250 with Android and Windows XP lets you switch between Android and Windows XP Home operating systems with just a click of a mouse.

I do not quite understand why Acer is launching a new netbook with Windows XP and not Windows 7. Only reason I can see here that the netbook is aimed at Android fans and the Windows OS is secondary.
Weighing less than 3 pounds, the Aspire One utilizes the Intel Atom N280 and runs on a 6 cell, 5800 mAh battery. Other features include 1GB of RAM, 802.11 b/g Wi-Fi, 160GB HDD, webcam, 3 USB ports, Intel GPU and Bluetooth.

Acer Aspire One AOD250 with Android Specifications

• Intel Atom Processor N280 (1.66GHz, 512KB L2 cache, 667MHz FSB)
• Dual-Boot Operating System, choose between Android and Windows XP Home operating systems
• 10.1" WSVGA Acer CrystalBrite™ LED-backlit Display
• Mobile Intel® 945GSE Express Chipset
• Integrated Intel® Graphics Media Accelerator 950
• 1024MB DDR2 667MHz Memory
• 160GB 5400RPM SATA Hard Drive
• Multi-in-1 Digital Media Card Reader
• Acer InviLink™ 802.11b/g Wi-Fi CERTIFIED®
• Bluetooth® 2.1
• Integrated Acer Crystal Eye Webcam
• Two Built-in Stereo Speakers
• Dolby Headphone Technology
• Multi-Gesture Touchpad
• 3 - USB 2.0 Ports
• 6-cell Li-ion Battery (5800 mAh)
• 2.79 lbs. | 1.27 kg
• 10.2” (W) x 8.4” (D) x 1.0” (H)
• MSRP: $349.99
• Four colors: Ruby Red, Diamond Black, Sapphire Blue and Seashell White