Radio Shack is about to start selling a subsidized Acer Aspire One netbook for only $99 with a two year contract for AT&T AirCard which will run you about $60 or more a month.
The deal really sounds good at first until you realize that your actually paying double the price when you factor in the contract monthly pricing.
On the other hand, if you're already looking to get a data plan, I would definitely wait until they go on sale at Radio Shack.