I just found this website via the Librarians’ Index to the Internet:  Commentary Today.

About CT:

Commentary Today is devoted to presenting the most diverse and comprehensive collection of opinions and commentary from America’s leading columnists.  In one spot you can access the opinions of the country’s greatest commentators on every topic in today’s news.

Every day this site is updated with the most recent articles from the featured columnists.  More columnists are being added every day so if you don’t see your favorite now, wait a short while and you probably will.

I’m not so sure that I like the Left v. Right format, but the site does serve as a nice host for finding articles.