JAX..pretty good reception.
ROC, in the common area outside the restaurants (don't know if it extends to the gate areas)

Of the last 30 I've been to, I don't think there was free wifi even in one. Europe's not doing well in that department... :(

CMH
ANC

both were fine, speed wise.

Add GPT.

COS...thank goodness as there is nothing else there!

Welcome to Portland International Airport
 

WiFi brought to you by...MetroFi..........your leader in wireless technologies

PIT - was horribly slow a few weeks ago, but they've got it. Normally I don't remember it being that bad.

LGB - Long Beach, CA courtesy of JetBlue, good speed

MCO-fast and reliable.
Amazing the USAIR club doesn't have wireless in Phl.

Adelaide free in all of the terminal via internode, all Qantas club lounges in Australia via telstra. Speed pretty good, generally B standard wireless speed.

Add SNN to the list.

Tpa ....

BDL - Hartford/Springfield

ROC - there are several networks, though, and you need to get on the right one
SEA - not free, but for the price of a cup of coffee, you can use the wifi at Tully's in Concourse A - ask for a code at the counter.

dimramon - great thread - would you be willing to keep a master list in your OP?

srq, tpa