"Tell a Friend" example (sending email/SMS to people in contacts)
<p>I'm developing application where I need to add the functionality of allowing user to send either email or SMS to people in his contact book about app.</p>

<p>Thus, I wonder if somebody wrote such code and would like to share it, or if you know any example in Internet where could I use.</p>

<p>or at least, if you know any example of sending SMS or email it will be good too. </p>
