The time difference for this Olympics means that the medal count isn't going to change much while you're at work. However, if you do want a quick heads-up via your computer, Medal Count delivers the goods.
Medal Count tracks Olympic medal wins by country, including the number in each category and overall ranking. You can add countries-of-interest to your watch list, and optionally turn on audio alerts whenever one of your tracked countries changes. The site's mobile version provides a quick look at the leaderboard when you're out and about.