To use it, open a new message to 77950 and type
" johndoe@email.com" and hit send. That's it, they've received your contact info (and can save it to their address book). If your friend signs up to the service, you'll immediately receive their info.

For example, you could...

Text    johndoe@email.com  to 77950
Text    donaldduck@disney.com  to 77950
Text    billgates@microsoft.com  to 77950
Text    winstonchurchill@england.uk  to 77950
Text    coolperson@thebar.com  to 77950

And they'd all receive your profile.
You may have noticed that all texts go to 77 950. You'll also receive a confirmation text message from 77950, the service we use to send and receive text messages.