Guild/community SMS Reminders

Please add a feature that upon acceptance on a guild event, you can set a SMS text reminder for X time before the event. I personally suffer from memory issues and I know lots of other people forget things sometimes even without these personal issues. Additionally, I would greatly prefer is the text were free and not cause a charge to my bill. Perhaps this is possible if you make the SMS feature unlock-able by the web page and or guild administrator by paying a small fee. Perhaps, $2 a month or $20 a year. Something, like that.