I was just about to ask a similar question, "Which Netbooks come with cards/drivers that support Packet Injection?"
After browsing the forums here and on other sites, it's hard to pinpoint a netbook that has several people confirming that packet injection works. Also, one user pointed out that they might have weak TX power.
I'd like to buy with confidence, but it's hard to be sure which model is the best. There is a recent thread on the Asus 1005HA that is inconclusive, with some people saying it works and others saying it does not.
Thanks for any help or recommendations.