(bump)
Just got the same thing (and am really happy with it and felt like writing a quick review), only with the Solomon GPRS USB Modem (Model SCWi275u) at one of the AIS Telewiz shops for 7,500 Baht. No cables required as the modem plugs directly into one of the USB ports on my aging Toshiba Satellite notebook. Perfect for those with old but not ancient notebooks, have an old mobile phone that doesn't do anything fancier than making and receiving phone calls, but would like internet access while on the road.
The "promotion" is still 40 hours a month for 300 Baht with the 1-2 Call Net Sim. More than enough time for my uses as I only need it when I'm at a construction site or in the car between Bangkok and Chonburi, or the rare occasion I'm stuck in Bangkok traffic or get caught offguard and find myself in a parking garage during one of those ubiquitous "midnight sales." As mentioned, there are "unlimited" plans available, but I didn't inquire as to those details.
Speed is fine (although I only use it to do online banking and answer emails), very few noticeable slowdowns with about one month into using it. I use Loxinfo and True at home, but I'd imagine you can use this thing with your desktop computer as well.
