[identity profile] bovil.livejournal.com 2009-02-08 08:25 pm (UTC)(link)
It's heavily compressed audio (since there's not that much data in a voice call in the first place), so it's not a real bandwidth suck.

It's also not an unlimited service. I think, as a permanent account holder, that I get 20 voice posts a month.

I used to use it to post urgent status when I only had a phone on me. I think I've used it maybe 5 times since I activated. That's a common pattern for most folks.

Now I've got a BlackBerry, and can post using the mobile web interface.