MiaMia is more than just answering questions. We aim to provide services for people on the go, and those who don't have access to the internet, but need it. "Poor man's internet", so to speak.
In the Philippines, for one, nearly everybody uses the internet. How else people are going to stay in touch with the relatives overseas? But for many (or probably most), using the internet means going to the internet cafe. It is a bit of waste to fork out your hard earned pesos to send a short note.
Or consider a different scenario. You are 20 years old, and backpacking somewhere in the Kingdom of Far, Far Away. You are staying in a small village, where two houses have electricity, and one house has running water. The word 'internet' causes the locals to expose their trademark toothless grin. Good thing you have your mobile with a local SIM card, and the connection is good enough to send SMSes. Too bad you don't have much load for international calls, and 3G and mobile internet are not exactly an option here.
Well, you have MiaMia as an option. Simply text something like:
send an email to myrecipient@faraway.com: hi guys, I'm alive and well
or
send SMS to +1234567890: hi guys, this is me, my phone number is this: +987654321
and it will be automatically forwarded to whoever you want. If you got it right, you should receive an acknowledgement (or an error message) within a few seconds.
Note that you can forward your SMS or email to everywhere in the world. So with a local access number, it will cost you like a local SMS.