What surprises me about this is that I thought Google were savvy enough to have a clear blog policy and that they would have ensured that all employees understood it. They are a truly geek-laden company, after all, and geek-laden companies should be amongst the first to realise that employees will blog. Maybe not all of them, maybe not all the time, but they will have people blogging and some will be blogging about their work and about the company.
For Google, that should have been a no-brainer, particularly in the light of the fact that they own Blogger. How on earth the concept of blogging guidelines could possibly have escaped them, I just do not know.