Coffee Shop WiFi Etiquette

Free WiFi seems to be far more prevalent over on the US side of the Atlantic than it is where I am in the UK, but that's not to say you never find it.  So it's a good idea for everyone to read Paul Boutin's Valleywag piece on wireless protocol, which deals with everything from power outlet hogging (nb. carry a power strip!) through to hourly rates (he's saying $5). 


Personally I'm thinking five bucks is a little on the low side and, considering Paul is talking coffee, snacks and tips in that, you're either getting ridiculously low-priced food and drink (which is entirely possible, compared to our over-priced economy) or need to reach into your pocket more. 

What's the protocol at Wi-Fi Cafes? [Valleywag]