As far as eventing goes, in addition to the quest we had some events on the 31st.
In the afternoon Ayu hosted an event, I think there was a storynight (people tell stories with words given to them, a sort of Improvisation) and a costume contest where players had to dress up and then explain their costume. I wasn't there (work) so I don't have more details.
During the evening I hosted a 4 parts event with novices, novice-events have the advantage of making all players equal.
We started out with a poring smash in an Izlude town clone, lots of porings filled with items, the little halloween novices had to whack them to get the stuff inside. There was healing items (for the other parts of the event), as well as chance items (obb, opb, wrapped mask, taming giftsets), and various other equips or misc (elu, ori, haircut coupons, pet eggs, slotted shoes and mufflers, etc). The porings and drops were quickly killed by the avid novices and we moved on to the 2nd event.
The next part was inspired by a post in this thread, that depicted an event on official server I think. I brought my novices to a Payon clone map and spawned Zombies all over the place, I then teleported to a spot and told them the first one to reach me would get a prize. The players could see my location on the minimap (I have an event-guild where I put all the novices in the event for easy teleporting). Most died, but a few reached me, the first one to trade me received a prize. I repeated this a few times, and was happily surprised at their skills to avoid the zombies, even if the mobs walk slow there was a lot to avoid and they had to walk to the other end of the town usually (I would recall them in one spot and then move somewhere far).
For the last part we moved to a Morocc clone and I used an unguilded character to open shops in the city, players had to find my shop and those few who did were able to buy some items (Novices start out with 500z and my items were all priced so that they could afford it), I repeated this a few times, then recalled everyone and made a last shop so they could spend their zeny for the ones who still had some.
Finally, at popular request we had 1 round of novice pvp, I warped them to a small map and after a countdown turned on PVP. Then I warped them to a special npc who handed them one last prize and a kafra storage pass to store their goodies.
Overall I think it was a fun Halloween, hope everyone enjoyed it as well. Talon events seemed really fun (love the thana maps!), seems ronin did something too, I hope we're not the only 3 servers who made something special. Now let's start planing for xmas! xD