I prefer netbook as HP which has the below configuration:
Microsoft Windows XP, Vista or 7
At least one (1) USB port
Wireless G network card
CD-ROM drive (DVD-RW or CD-RW preferred)
Screen Resolution: 800 x 600 or higher
3-year hardware warranty – remember, you may be using your laptop for 8+ hours a day, 7 days a week
1GB (or more) USB flash drive – for transferring/backing up your important data
Laptop carrying case – offers more protection than a backpack