Jakob Neilsen has just released his 2007 Intranet Annual, in which he nominates the ten best intranets of the past year. Having read several of these reports, I have come to the conclusion that almost all intranets contain exactly the same content.
In fact, my analysis suggests that there are just four pillars of intranet content: Work content, HR content, Corporate content and Social content.
Although individual sites differ in terms of specifics - the core themes are almost indistinguishable. Read more about this idea and see some examples in my latest web article