I just got that same message including the part about if I wanted to know who then I needed to add them to yahoo messanger with that same ID of txtiewoman290
Same "Hi - and my name-" I asked who they were. They said to find out who that was I should have added them to my Y! Messenger under textiegirlie033. I said I pay for each text coming in and coming out so they already cost me $1. Thankfully they did not respond.