HP recommends Windows Vista Business.
IntelCore 2 Duo T7250 (2.0GHz) processor
14.1" WXGA display
1024MB 667MHz DDR2SDRAM(1 DIMM) UPGRADED TO 3GB 667MHz DDR2SDRAM

80 GB 7200 rpm HDD UPGRADED TO 150GB 5400rpm HDD
ATI Mobility RadeonTM X2300,
Integrated Intel Pro Wireless 4965AG
6-cell Li-Ion Battery

Price for brand new around $1200, Used around $800, but would accept reasonable offer, so feel free to PM with your offer.