You can now update your status on LinkedIn and Twitter simultaneously. To do this, sign on to LinkedIn.
Then, go to your home page and under the Inbox, look the status update box under "Network Updates." See the Twitter icon next to the "Share" submit button? Click that if you want to enable simultaneous updating.
When you do, a pop up box will ask you to authorize your Twitter account and then will give you options on updating Twitter from LinkedIn. You can enable your Tweets to become your LinkedIn status updates at this point. Once you've selected your options, you're set to simultaneously update.