Don't be afraid of what these little suckers can do... I have an Acer Aspire One (9" Version) with the small battery. It came with a 120GB Hard drive, WinXPHome, 1.6GHZ Intel Atom Processor, and 1GB of ram.
While I don't plan on using it for Aces High anytime soon, it is plenty fast enough for just about anything on the internet, including downloads, movies, Flash Games, and Java Applications.
It has wireless LAN networking built in with a small switch to turn it on and off at the very front. With it turned ON, I get a good 2.5-3 hours of battery life. With it OFF I would imagine it would push 4-4.5 hours, and with the big battery they claim up to 9.5 hours of battery life!
No DVD player, no problem. Just purchase a USB thumb drive (you can get 10GB-20GB versions now quite cheaply) and copy your dvd's onto this drive at home... then just use it to watch your movies out in the field (no pun intended).
The first thing I did after getting mine was uninstalling all the proprietary JUNK off of it, and installing AVG. You'll probably want to do the same.... just don't be afraid because these are more capable than you think.
Good luck!