My first use of the iPad with 3G enabled

This morning I enabled a data plan on the iPad. I'm able to use logmein over the AT&T network with a bit of lag. I tried to download some new apps and was unable to download any apps that were over 20MBs in size. I also attempted to stream video with the TwitPad app. This functioned fully as it does while connected to my home WiFi network. The testing location for this batch of tests was located north of Kansas City International airport and about 2 miles off of Interstate 29. So far the data usage while attached to 3G is 40MBs. This with about an hour and a half of usage time. With that being said I do not see the $14.99 data option being of any value, unless you are planning on just using it check email and occasionally browsing the web.