We don't know about you, but most of us Engadget editors live in a perpetual state of inbox insanity. Keeping on top of voicemails, text messages, emails, IMs, Twitter DMs, Facebook and Google+ messages -- to name just a few -- is a herculean task yet also an essential part of our every day. As a result, personal messages often get drowned out in a sea of work-related correspondence. Sounder is an app that aims to ease the inbox pain a little by providing a simple and immediate way to speak with those people that really matter. Pick a few important Facebook friends and the app lets you talk to them directly at the push of a but
