We take a look at the much-improved (visually and functionally) LinkedIn mobile app. Screenshots are from the Android version, but the same features exist in iOS version as well.
From the LinkedIn app, you can post a status update to both LinkedIn and Twitter simultaneously. You can also choose whether to share your update publicly or with your connections only.
Unfortunately, the LinkedIn app can only search for people. This means that using this app you won't be able to do research on groups, companies, or job openings while on the go.