I thought this was an interesting site. I doubt it'll hold in court and chances are, if you're using it, you're prob pretty toasty (afterall, that's how I found it).

Online Breathalizer

   

Something's wrong with it... it's telling me that if I drink a quart of rum in six hours, I should be dead.

Let's just say field tests have proven otherwise!

What did you "e-blow" tonight, boss?

   

sshhh! This is for reference only!

   

They classify 4.9% alcohol beer as 'heavy'. I thought that was normal.

   

americans...

:p

   

i couldn't get the site to work right....LoL

   

I was going to say, it seems pretty complicated... I think if you can get it to work, you're probably sober.