I figured I'd ask you guys because I've contacted Twitter about my situation and they think it may have something to do with my phone provider, which happens to be through Verizon.
I'm a sucker with Twitter and I like to receive Twitter messages from other people through my Blackberry. Most of the time I'm able to get SMS messages but one or two people that I'm following I don't get messages from them. I try to unfollow them, then refollow, the press on to receive text messages. That works for a short time but I still have a hard time getting the messages. Lately I've been checking my Twitter home page to see if any new messages came in that I haven't received through SMS.
I don't know if this is something I need to contact my provider in person or contact Twitter again.