I did not enter a contest for an iPad 3 but got an sms message a few minutes ago from this number stating I had won and I would need to reply in the next hour or forfeit. Guess what - I am going to forfeit - this sounds like a scam to me even though it would be nice to have an iPad.
The fact that there is no site automatically makes me skeptical. I received a text, too. I looked the site & phone number up in different ways & on multiple search engines, to no avail. I'm going to forfeit, too.