Selected answers from the Dumb SEO Questions Facebook & G+ community.
Ibnu Rzal: How to evaluate ;or want to ;know ;the difficulty of ;the competition ;keyword
Brett Saltalamacchia: Seems like a question to ask on a forum, checkout ;http://www.theseoforums.com
Kyle Hawk: Market Samurai has always been a good resource for me.
Dave Elliott: Look for the competitions domain authority and the link profile of both the site as a whole and the page that is ranking for the keyword.