Google Voice is an exceptional tool, but the problem is that it just isn't available worldwide. If, like some of the iDB team, you happen to have the audacity to live outside the United States, then you are completely out of luck.
While Google promises that Google Voice is indeed on its way beyond American borders, there are alternatives out there that do the same thing, and if you're an iPhone owner, one of those alternatives is Libon Voicefeed from developer Orange Vallee.
A free download from the App Store and compatible with a wide range of mobile phone carriers across the world, Libon Voicefeed plugs the hole left by Google's reluctance, or inability, to bring Voice to the world. And it does a very good job of it, too...