OK.  So I decided I would call (fearing a long wait) and was referred to a tech that seems to know what the problem is.  Apparently the e-mail application was using on my LG, though cancelled, still has a process running in the network somewhere.  That mail app, Vemail, uses SMS to push e-mail alerts to a phone.  Looks like Vemail is still sending those SMS messages but the BlackBerry doesn't know what to do with them, so they just come up as text messages.  They had to open a ticket for the network guys to find the problem and shut it off.  We'll see.