A lot of people have asked in the past and recently if there was a way to get updated by email from the forum. Now this feature has been installed from the beggining, but it is a little hidden.
Unfortunately the email isn't exactly what I would like, you can't reply by email, and the only formats avaliable are daily and weekly digest.
Or go to the forum section of your choice, you will see an option at the top Call Forum Tools, click on that. A drop down box will appear, from there click Subscribe to this forum.
Let me know if you have any problems or questions,