From the LinkedIn blog:
Last year, LinkedIn acquired Rapportive, an email company that I co-founded. Since then, we have been furiously working together to build a groundbreaking mobile product: LinkedIn Intro.
The growth of mobile email is simply staggering. Four years ago, less than 4% of emails were read on mobile. Today, half of all emails are read on a mobile device!
So we set ourselves the challenge: bring the power of LinkedIn, and the technology of Rapportive, straight to the Apple Mail app on your iPhone.
We call it… LinkedIn Intro.
As friendly and useful as that sounds, many security firms are recommending against this new service. One such example is Bishop Fox. From their blog:
Intro reconfigures your iOS device (e.g. iPhone, iPad) so that all of your emails go through LinkedIn’s servers. You read that right. Once you install the Intro app, all of your emails, both sent and received, are transmitted via LinkedIn’s servers. LinkedIn is forcing all your IMAP and SMTP data through their own servers and then analyzing and scraping your emails for data pertaining to…whatever they feel like.
“But that sounds like a man-in-the-middle attack!” I hear you cry. Yes. Yes it does. Because it is. That’s exactly what it is. And this is a bad thing. If your employees are checking their company email, it’s an especially bad thing.
Why is this so bad? Here’s a list of 10 reasons to start:
I think I’ll pass on Intro, thank you very much.
(Thanks for the link, Chris)
Gregg Eldred 
W. T. F. ???