Eagle-eyed Hamza Sood discovered text strings in the iOS 7 beta that show Apple to be testing LinkedIn integration. Features being considered are likely to include single sign-on - the streamlined password requirements currently offered with Facebook and Twitter in iOS 6, allowing iOS access to your Twitter and Facebook profiles once you've signed into them through their respective apps - and the ability to easily post links to a LinkedIn profile.
It would be a tremendous coup for LinkedIn if it could make it on to iOS 7's share screen, establishing it as one of the big three social networks and giving it instant exposure to the massive iPhone and iPad user base (the majority of which are likely to update to iOS 7 in fairly short order).
None of this is official at this stage, of course, and could simply reflect one of several options Apple is looking at. However, one point in favour of LinkedIn getting the nod is the agreement already announced at WWDC that sees the social network tie more closely into Mac OS X Mavericks.
[Related: Apple redesigns widely criticised iOS 7 app icons | Will I be able to update to iOS 7 on my iPhone? | Apple iOS 7 announced at WWDC 2013 | How to update your iPhone or iPad to Apple iOS 7 | Apple iOS 7 for iPhone and iPad preview & first impressions | Massive iOS 6 uptake is good news for Apple's iOS 7 launch]