I guess in short, alot of us have moved on (family, different cars, different interest), or taking care of backend technical stuff and also coordination from time to time.
We still keep in touch with several members who are no longer forum-active via other mediums on daily basis (FB, MSN, Skype, lunch meets, online games) thus the communication amongst our old forum friends are now off-forum. Time passes and new faces and members join the forum & this is where it gets a little hard to put names to faces and to get acquainted with their personalities.
The forum needs new blood who are active. It's been years that members have recommended moderators but very very few take up the role. I don't think that's any special caliber that's required, but someone who's active and comes to the forum frequently is waaaaaaay more prepared to handle issues than those who only respond when something has happened (many of us).
If you fit the role, or know anybody suitable, please recommend. If you feel that moderation is inadequate, we hope you can help to moderate some of the more serious topics too.