LinkedIn has updated its iPhone app today to version 4.0. It's actually more than an update -- it's a complete overhaul of the app. Version 4.0 features a totally new UI with quick and easy access to four areas of LinkedIn: your profile, account updates, your inbox, and groups. Tap on any one of those area's icons (the icons change in realtime to display what you last viewed in that area) to further view your LinkedIn world.
The old LinkedIn app had one of
