Check is site down or just you have a problem

Nice idea, but the site itself doesn't seem too reliable to me as, in admittedly a very short test, it was down about half the time. Also the comments in the Lifehacker article suggest that it was down for a lot of others too.

Nothing to download or install, just open the site, copy over the url you're worreid about and click.

Anyway, no harm in keeping it available. Maybe it'll get better.