Intranets are getting more strategic, with increased collaboration support. Team size is growing by 12% per year, and platforms are becoming integrated, with a strong showing for SharePoint. Improving usability increased use by 106% on average.
I posted to delicious.com
10 Best Intranets of 2009 (Jakob Nielsen's Alertbox)
http://www.useit.com/alertbox/intranet_design.html