What do you think, a possible visitor would think about widgetwidget.com? Would he click on such a domain? Would it read spammy and unprofessional? I don't see a special value of keywords in domain names anymore. I have fantasy name domains that outrank my keyword domains. I recently built a keyword-keyword2 domain without seeing any extra benefit.
Google friendly? I'm not sure how google will treat widgetwidget.com domain names in the future. I'm also not sure if stemming will help you with backlinks that use widgetwidget.com as anchor.
I'd sit down with a bottle of red wine and a standard domain lookup tool and start brain storming about a good, easy to remember, inviting unique domain name related to the site topic.
And uniqueunique is not unique.