Dashes or Underscores in URLs?
Here’s an article by Matt Cutts (found through ProBlogger) that explain, in a few but informative words, why it’s best to use dashes rather than underscores in your URLs, at least when it comes to Google:
With underscores, Google’s programmer roots are showing. Lots of computer programming languages have stuff like _MAXINT, which may be different […]

