Bagi
has created a brilliant SEO friendly guide for my blogs. A brief except:
Hyphenated URLs
Observed and easy to prove that search engines can’t recognise the keywords in the URL if you separate them with underlines. Many effective ways exist to show those words properly for the robots, but the most elegant is the hypens in my opinion. After the keyword research you should have many phrases, which you would like to place in the title tags and do the same concerning the URLs. Search engines really like the keyword rich web addresses, so use the cleverly, separating them with hypens.
You can read the full article at
web design section of my blog