The Acer Aspire One grabbed 38.3 percent of Netbook market share in the third quarter, propelling it past industry pioneer Asus and its Eee PC 4G.
Acer's Aspire One normally sells for about $300.
The RadioShack-AT&T offer, as previously reported, is valid through December 20. The 2.44-pound, 9.8-inch by 6.7-inch Netbook includes:
• Built-in 3G capability
• 802.11b/g wireless (Wi-Fi)
• 8.9-inch LCD screen
• Built-in Webcam
• Intel Atom processor
• Windows XP Home
• 1GB memory
• 160GB hard drive
• Built-in memory card readers (dedicated SD and 5-in-1)
Other players in the Netbook market include Hewlett-Packard and Dell.