Nokia has officially entered the netbook market with the launch of their Nokia Booklet 3G. The netbook is sporting a 10.1″ display, an Atom Z processor, and it will be running Windows 7. The Booklet 3g has a nice clean design with a glossy cover that comes in a choice of blue, white or black. But what really makes this netbook stand out is its claimed 10-12 hour battery life. The system also features a neat fanless design, it comes with Ovi software, and it will also come with built-in A-GPS and AT&T mobile Broadband. You’ll be able to pick up the Booklet 3G on October 22nd for $299 with a 2 year AT&T Mobile broadband contract. Unsubsidized, it will cost you a whopping $599. The netbook will also remain an exclusive to Best Buy through out the holiday season. If $60 a month seems hard to swallow, there is some light at the end of the tunnel. Today at the Nokia Booklet 3G’s press conference, AT&T let it slip that there are likely to be more affordable netbook mobile broadband plans coming soon.