Today I recieved an e-mail of Microsoft with a link to my Windows Azure bill. Strange, I tought I had 250 hours of free compute.
After much clicking (well hidden rates) I only seem to be entitled to 25 hours of free compute each month. The bill added up to 77 hours already and the amount was 5.50 euro. Luckilly for me I stopped the services and removed them before the weekend.

ps. my rates were attached to my sign-up e-mail