EFF Lists Wi-Fi-Friendly ISPs
trifster writes "It appears that *some* ISPs encourage Wi-Fi hotspots from users connections. Cnet News.com has the article here." The list itself is on the EFF's site. Most of the ISPs with policies against wireless NATing seem to turn a blind eye to it most of the time anyhow, though.
quoted from the article... "Speakeasy's CEO has gone on the record in support of broadband sharing via wireless, basically saying 'you pay us for the bits you use and are welcome to do whatever you like with them."