Hey, cheers for the suggestion.
After looking into it, we found that the conversion rates are around 60%, this means that donator prices would have to be higher if donating by sms. e.g for a $10 donation, we would only receive $6, so in effect you would be charged a higher price!
If you feel that you'd still be willing to pay, then we will look into this and can easily implement an sms payment system - except with higher prices (these higher prices will only affect sms donations. Paypal donation about will remain the same).
Inc