I'm in the 780 area code and I've just received the same two messages. Both received at 16:15 on my BlackBerry and both from (416) 555-2121.

1st:
//WDAAMAXRABXwLoABABChCK6AAyiCgQEBwMIIQUHKNDo6OB0Xl7a8uDSxujq5MrmXMTK2NhcxsJeXubQwuTKmsrm5sLOylzI3n7S3OzS6Mp63Iq05GjelJxqqqBgtG6e1tDCltYAA0Q

2nd:
//WDAAMAXRABIQD4ABAIACAEKCgag0sZerNLIWprK5ubCzspAAAwGABYCA==

I thought it might be a script of some sort to triger information send back. I have a firewall on my BlackBerry and if this continues I'm going to enable it and see if it will block these texts. Also, if enough people call their providers, a 'harrasement investigation' is conducted between your provider and your local police. I've done it before.

What does this mean on my itemised calls? ?the number called is 2121, SMSReceiveReply0Branded, 1 event (cost=0).

and virgin mobile is based off of bell mobility.  coincidence that bell and virgin users are being texted.  I activated my phone online by myself.  I don't receive any of these bu***hit calls.  when you activate your phone at the kiosk(s) They send your number off to the marketers.

I got the same thing on a Samsung Instinct.  And only my dad has my number as it is brand new.  Got for in a row - same script as above.  Very odd.  Plus I have free incoming text - so i doubt that its a money grabbing scam by providers.
Very strange!  Even more strange is the 3 websites with this discussion about the same number that doesn't exist!

i also received 4 garbles messages from this number at the same time a friend tried to send me a photo

I got the Rumor 2 a few days back, and Ive gotten these texts 2 days in a row. It must be something to do with the phone, because some commetns are about the Rumor to.... I personally think its a code, but to what? The 416 is the area code for Toronto, but that probably doesnt help. This is really creeping me out, and I think something should be done about it.