Google sends SMSs ???
Anyway, AFAIK Google doesnt use any client based resources, so if you could do it before from a Windows machine, it will work the same way (provided the same APIs are used, so we are talking java etc)
I'm just wondering if google calendar would support sending SMS reminders to people who are subscribed to your calendar? You could rig something up from the calendar api that worked like an sms client. It would be a good way to get your google account closed for abuse though