CAcert

Now I'm a...

Certified CAcert Assurer

This is nice to have but I see no benefit of giving certificates to assurers who passed the 'Assurer Challenge' (there are some tricky questions but you can make the test as many times you want) and have over 100 points, or are you a 'Certified PGP/GPG Keysigning Supervisor'? At the other hand it's the only way to get the certificate in the browsers of Mozilla.