I found out the reason I was getting this message is because I set up auto alerts at ebay, for auction notification.
so if you have any alerts set up on any websites, cancel them and it might stop. this stupid oz company does alerts for al lot of companies, including airlines.
hope ths helpls...

Last year I had the Voyager and never had this problem.  I upgraded to a Blackberry and all of a sudden I started to receive these wierd text messages.  I switched back to the Voyager and the problem stopped.  I switched to the Sagsung Omnia early this month and started to have the same text- coming thru every 5-10 minutes!  I called Verizon thinking it was them and I only had two options: Cancel my text messaging capabilities or change my number!!
Every time I received a message, I replied "stop" or "unsubcribe".  
It finally stopped- but I just got my bill today and I am now being charged for 7 Int'l Text Messages!!!

I just got off the phone with Verizon...they could not see the text on their end when they reviewed my text messages.  They did set my account to block spam text messages....will post later if that does not help.  I get them like everyone else (2 at a time) every couple of weeks.

Verizon said they issued a trouble ticket to have it checked out.  We'll see :)  My hope is that the spam block will take care of the problem

it worked Thanks

Soon after I activated my Samsung Omnia w/ Verizon I started receiving these messages, apparently whenever I received a new hotmail message. I replied STOP 10 times before they finally did. It shouldn't take 10 TIMES! How could I know they were costing me 25 cents each? This is a total scam. It is obvious they kept coming in an attempt to get more money out of me with my STOP replies. If there's any talk of a class-action lawsuit, sign me up. This is ridiculous!