I have heard (urban myth?) that some people are providing a voice broadcast service as part of an offline marketing strategy (i.e. instead of emails, blast out monthly messages via phone to customers about upcoming sales, events, etc). The urban myth reference relates to the fact that that information came to me from promoters of the voice broadcasting system.
I ask because I invested in one of these a while back, haven't used it and am just about to let it go because I'm paying a monthly service fee. Before I say good-bye to it though, thought I'd check in and see if any enterprising warriors are using this as part of their arsenal with any success.