The report issued by research firm ABI Research says there are 1,500 square miles covered today: But the company estimates 126,000 square miles by 2010 with one million mesh nodes shipped in that year alone for $1.2 billion. The report's overview doesn't mention customer premises equipment (CPEs), the bridges that will be used to bring outdoor Wi-Fi to indoor locations. It's likely that millions of these units will be sold per year within two to three years if these networks are built at this scale. A specialized market is just starting to form.