Over last weekend we added a new feature - Question Watch.
It basically means you get get notified whenever a question you are 'watching' is answered.
To do this, find a question that you want to know an answer to and below it there will be an option to get an e-mail alert when the question is answered. You can administer your question watch settings by logging in and going to your watch list page as usual and remove or change the frequency of alerts.