Did you know... if there's a particular thread you're interested in you can 'watch' threads on site and be notified of activity on that thread?
Just simply click the yellow 'Watch this thread' button at the top of any thread (just under the title). This thread will then be added to the list of threads you are watching, which you can find here.
There's an option on this page to be notified by email - just update your preferences next to the 'Receive email notification for watched discussions?' text.