Review of Text Surprise free SMS site:
SMS site description:
Free SMS service for Canada and the US. Site shows which US and Canadian carriers are supported. ...
Registration required, etc:
|Confirmed delivery of messages?||Yes|
Just added by site owner (Jan 2013):
"I am about to unroll a ton of updates I think your users will like:
* Send SMS from any email
* Send & Receive messages instantly with your own @textsurprise.com email
* SMS API Developer access for the world to send SMS for free..."