Video demonstration
Those features were taken from Google's page describing this new service, which we understand is expected to be made available for free. On that same page you can access a bunch of short videos demonstrating the above features like this one.
We'd like to know what you think; most commentators seem to think this is the best thing since sliced bread. Right now only GrandCentral users and a select few others are able to use Google Voice but it's expected to be made more widely available soon. If you've managed to have a play with it or just have some initial thoughts, we'd like to hear them in the HEXUS.community discussion forums.