Received a text message on 3/21/2012 @ 8:26am EST. that reads: "You have just won a $1000 Walmart Gift Card! To claim go to http://prize-patrol.ws/walmart and enter (BLANK-4 LETTER PASSWORD)". I do not trust it. I do not think it is legit. I have not filled/submitted any Wal-mart surveys & do not fill/submit/participate in any survey type contests that is left to chance.
If they want you to call, it's likely the automatic debit scam http://www.ftc.gov/bcp/edu/pubs/consumer/telemarketing/tel06.shtm
If they want you to text, you may get a HUGE $FEE for texting back.
If they want you to visit a website, the website may infect your PC/phone just by visiting.
I received a text from 571-216-5003 indicating I have won a $1000 Wal-mart gift card. When I called my local Wal-mart, they do not know how they notify the winners. Company employees should be aware of scams like this one. I almost loaded the web page just to see. I did answer one of thir phone surveys about Wal-mart's servce, so I want to know if this is legitimate or not. Looks like it is not!.