Not sure if this is the next big scandal, but I've seen a couple of stories on how Skype has blocked Fring. Fring is an iPhone app that's been around for a few years now and connects to a bunch of different messenger services, including skype. With the iPhone 4 they've recently shown off how they too can do video calling over skype (which, I believe, skype doesn't do yet).
From the Fring blog:
Needless to say, we are very disappointed that Skype, who once championed the cause of openness is now trying to muzzle competition, even at the expense of its own users.We're sorry for the inconvenience Skype has caused you.
Another story on this is here. Not sure if this is maybe some "oops" and it'll turn out to be a non issue, but I can see a lot of Fring users, and general internet rage about this.