Whitey - 7:42 am on Feb 20, 2013 (gmt 0)
Over recent years multi domain strategies have become resource hungry. EMD's will not rank alone without lots of support. IMO - unless there are exceptional circumstances, it's best to focus on real business enablement.
Ask yourself the question. If Google didn't rank my sites, would I have a business. That answered, focus on brand and sustainability not EMD's, another re spun unique content article that Google ignores and other SEO tricks.