Is there any reason not to have a discussion forum online rather than a mailing list? Personally I find it really "old school". I mean why would you like seeing things like

>> something
>>> something else
>> another thing
>> there

showing up in your email all the time, when you could go to a nice, organized forum and search it easily and search for new/unanswered posts, etc. There are even free ones that work great (phpBB, etc).

Any comments?