Okay, I've been in a few clans before. I will list common events I have been to.
At a firefest, all members attending will set fires in a major city and advertise for the clan. These events are fun and great for recruiting.
Agility training events
All members attending will report to the agility course mentioned. Agility will be trained as a clan. these events are great for many reasons: adds fun to a skill otherwise thought to be boring, increases the number of members able to go to sara gwd, and increases the clans average agility, which is an important skill for any warring that is to be done.
not exactly an event, but still great. A skill can be assigned, or overall experience can be used. For a set period of time, like 1 week or a month, those competing will train the given skill. The winner can receive a signature or cash prize.
Who doesn't like piling people?
Now some suggestions for the forum, as I don't see anywhere else appropriate to post them.
* condense the trade forums to simply: buying, selling, lending. The large list currently up adds a lot of size to the website, and trading never really reaches a large quantity within a clan
* add a few forums: 'show-off' for showing drops, levels and other achievements, 'entertainment' for posting funny/interesting things like youtube videos, 'general' for having discussion for just about anything.