Second Life offers optional Voice First Look viewer
Second Life offers optional Voice First Look viewer which offers new features based on feedback to the voice user interface and Communicate window. In addition, participants lists can be hidden and shown and new icons and options have been added.
There are several keyboard shortcuts: Ctrl-T toggles the Communicate window, Ctrl-W closes the selected tab, Ctrl-H opens (Chat History), and Ctrl-F goes opens My Friends.
Download the beta and try it out!