A recent TechCrunch post is claiming that visual voicemail has been down for weeks for some customers and AT&T didn't bother to tell anyone. They're quoting a twitter search as their source. My visual voicemail has been working fine and I suspect that everyone who claims that theirs is down has used the tethering hack and failed to realized that it often breaks visual voicemail. Is your visual voicemail working? Are you using the tethering hack?