Here's an article that caught my attention the other day: FaceTime greets, disarms spyware (InfoWorld).
I don't know about anyone else, but it bothers me that a company that sells an instant messaging service is announcing other instant messaging services are security holes, and then starts offering a product that plugs those "holes." So, you can pay them $5,000 for their spyware protection suite, and then you'll have to choose them for corporate messaging because your new spyware protection suite blocks all the others.
There are definitely problems with spyware, and problems with some IM systems, but this is just a bit too self-serving and back-handed for my tastes. Protect yourself against IM networks that you don't want available to your employees, but don't use an IM vendor's software to do it. I'm all for security, but I think a separation of duties is necessary.