Oh, I see we're back on topic. BTW, The Big Mango is not a brothel, it is a casual bar/restaurant. It is not unusual to see two or three people there with laptops or PDAs working. I would not have recommnded it if I thought there would be any issues whatsoever.
1.) Buy a mobile phone which is unlocked, supports GSM 900/1800, has a GPRS modem, and which can be connected to your notebook PC (via a serial, USB, IR, Bluetooth).
2.) Buy a 1-2-Call SIM (250 baht comes with 50 baht of talk time). Maybe top-up with a 300 or 500 baht top-up card.
3.) Call 1175 from you mobile phone, press 2 to speak with an English-language CSR. Ask about GPRS packages (pay as you go, monthly recurring), enroll, ask for set-up instructions.
4.) Set-up a dial-up connection
There are a lot of issues/variables to sort out; I've had to set-up ~ 6 different computers for friends and each one has been a challenge. But once you get it working it's a great service.
Go to
www.mobilelife.co.th , scroll down, on the left-hand side, and choose "GPRS Package".