I am not sure. I tried email because I was new to Google App Engine and I was trying to learn how to send and receive email; and also email appeared to be easiest. I vaguely remember reading here that the younger generation do not use email anymore. An sms version will make this service much more fun to use, but that's something to consider later.
Comments
> email based
Is your target demographic really using email to communicate over Facebook, Twitter, SMS, IM?
I am not sure. I tried email because I was new to Google App Engine and I was trying to learn how to send and receive email; and also email appeared to be easiest. I vaguely remember reading here that the younger generation do not use email anymore. An sms version will make this service much more fun to use, but that's something to consider later.