Same here on April 4th but not again since then

I too just received a text with the free iPad 3 testing offer.

http://theipad3.mobi

Obviously, it's a scam and you won't receive it after it has been out for some time now.

Received a text : Apple is looking for people to test and keep the new iPad 3.  But only to the 1st 1000 users that go to  Http:theipad3.mobi and enter code BETA will receive it.