Do you call people after hours because you know they won't answer their phone -- and you can just leave a voicemail message? Do you send people emails in response to their voicemails? Bubble Motion, a tech company in Singapore, working with Swedish telco Telefon AB L.M. Ericsson, now offers a new voice messaging service. (Wall Street Journal subscription required.)

What's new about it? Rather than call someone, not get through, and leave a message for them to reply to, you can simply record an audio message for them using your phone -- and send it to them. Think audio SMS. Part of me is excited about the possibility: More immediate, more personal, more human than email, SMS, or voicemail. But part of me is skeptical: If you really want to communicate with someone, are such quick hits overly passive?

What applications do you think this has in the workplace?