WEP is dead, how's the reception?

So WEP is dead, and the following are known: 1. you can drive around a city and sniff data (one ref) 2. folks can point a pair of dishes at each other and do 10 miles w/out extra ampl. (many refs) I'm curious: what range can you intercept 802.11 data with reasonable S:N assuming that the source is *not* cooperating as in 2. above. Lets try to answer this. A 2-m dish could give 30 db? (Damn, used to know that function of wavelength...) How many times the default range does 30 db give? (Damn, 30 dB is probably a power figure? 30 db is 1,000 times... range would be a square of radiated power.. sqrt 1000 is 30 something.. range of 802.11 is probably 100 m? so 3 Km, 1.5 mi with a man-sized fixed dish... too directional to drive with...