Sound planning and governance is a big part of optimizing SharePoint for any organization. You may want to listen in to my BlogTalkRadio interview with experts on SharePoint Deployment Planning Services (SDPS) at 9:30 A.M. EST this Friday, 2/25/10 - here are further Show details. You may also tweet in your questions during the Show by contacting @glvaughan.
More to your question, here is the link to a Show I recorded earlier this month to explain the benefits of SP 2010. It has enhanced social media and other features, but again, planning, training and requirements analysis are a large part of any successful SharePoint implementation.
Hope you find these useful!