In my second Newman link of the day, Nathan's got an excellent case study of how union votes are won -- by anti-labor corporations. Go.
By the way, you're probably going to see a lot more labor posts on this site. I recently read Thomas Geoghegan's Which Side Are You On: Trying to be For Labor When It's Flat on its Back (a really phenomenal, visceral tour of the decline of Labor). True to the title, you can't read the book and stay neutral -- which is why everybody should read the book. For my part, I'm determined not to contribute to progressivism's strange indifference towards labor issues. Indeed, I'd like to push us in the opposite direction, so expect the blog to be affected by that. If any of you are well-versed in labor issues and could recommend some books or sites that could help me, I'd be grateful.
Update: On that note, read this Nation article on the future of Labor.