http://www.truecorp.co.th/index.php?name=p...ail&promo_id=98

If you've already signed up for @truehisp at less than 2Mbps and want to see what it feels like to be on the autobahn, you can supposedly try it out at 25 Baht/hour by simply using login-name@truehisp to login-name@true2m when you connect.

I'm sure it depends on a lot of variables as to what the actual speed will be (server speed, time of day, etc.), but it looks like a fairly decent deal. It might even make sense to sign up for the cheapest plan and use turbo only when you need it.

Has anybody tried this yet?

Someone tried it a while ago:

http://www.thaivisa.com/forum/index.php?showtopic=16544