We use it very heavily in the office in the office (IT Industry)

If you are aiming to contact specific customers you will usually find them on there and can then go about trying to infest their lives with your products. They have an enhanced mode called navigator which allows you to build a company wide LinkedIn Massive in the words of Ali G.

Also use it to find new staff, the "if you like him then you might like him" works well. There is a recruiter angle to it as well. You can search profiles if they are correctly filled in.

It is becoming a little like a business twitter with lots of boring marketing by another name posts clogging it up. Far less annoying than fuzzbook and twatter from a business point of view though.

Our HR team use it to find out if you are employable. Compare the CV you send in to it. It is amazing how people forget to make these things line up. Also look at FB and Twit to see if you are a hazard to yourself or society never mind your new company! One of our Swedish team was constantly posting photos with him and his kids during week days. He didn't last long.

It can also be handy when looking for jobs.

There are a lot of privacy settings that should be investigated.

Everyone loves a Morgan. Even me, unless it's broken again.