d_reaper: My suggestion: a
Weekly tournament that will happen in an special place in arena thats is for players with lvl bracket of 1-24, 25-49, 50-74 & 75-100. Rules are : No Jewel, Hardcore (meaning if you die you lose an item), You need to register your account in the tournament list, the tournament will start and end within 30 mins, registered account wont be able to play untill the tournament is over, battle should be randomly computer generated lvl 1-4 will fight each other 5-9 , 10-14, 15-19 and so on, there should be a scoring system if you beat a lvl1-9 = 1 pnt , lvl 10-19 =2 pnt and so on, youre character will fight till it dies and all the points he got will be on a tally, the highest scoring player will win the tournament and will be given an prize item by dreamer ofcourse lvl1-24 will get a good item lvl 25-49 will get better, lvl 50-74 best item and lvl 75 and up a recipe, premium or credits. Took me 5 mins to write this down. I almost forgot dreamer should make a weekly scan on accounts i.p. to prevent cheaters.

agape: For server 3, you might add more monsters that can only be found on s3 and some rare or precious items wich can only be hunted on s3, close all castles on s3 so all players will have fair xp. The marketplace also, as what I have suggested you better put an option where we can choose our buyers, the choises will be Public, Clan and Player (I dont have to explain this one casue i already posted it on Profile view update). And it's more challenging if that server will last long so some players have time to hunt, make the legendary dragons more stronger, and the best one, make some new legendary gears for level 100, the requirements are some titled legendary items (Like Vigilan hauberk, Purifier vestments, Oakcase) Im sure this will help the game still be free cause many will going to purchase credits to have that level 100 legendary gears, example, someone got a recipe for a level 100 Barbarian and the requirements for that item will be Demon's oakcase(just and example) and mabe 2pcs of Jewel of armo (V)..
And try making new titles for level 90 and 100, that can only be achieved there in s3, and may have 10% to get that title using scroll, or it's up to you..

I will try to think more suggestions..

gilang: 1.you lose exp when killed by monster.
2.no regeneration while offline.
3.there will be just ONE class,warrior. so,everybody is same at the beginning. warrior can use item of any class,can enter all city,but they can't use any spell (except portal,element protection and arrow,arrow is non elemental attack,the only one attacking spell)
4.all player except winner,can change their class to barb/druid/paladin/necro after wipeout "if they want". the winner get diablo.
5.strenght potion,increasing strenght for 5 minute.
6.dexterity potion,increasing strenght for 5 minute.
7.new boss,the dragon king.
8.restrart to lvl 1 if killed 1000 times.
9.lose 10% exp if banned.
10.mysterious potion,have a random effect,it can increasing exp,hp,mp or gold but can also decreasing them.
difficulty:-SUPER HARDCORE!!!

hulyo: gugugugu's suggestion is great

I suggest that, you cannot transfer credit to a player from different server, because this is a big disadvantage for new players. Rich players from server1 will just transfer credit to their character from server3 to make it easier for them to survive in that server, so that's why this is a big disadvantage for the new players of B.D specially if they're not that rich in server 1.

zrubys: Menu Quests=boss,add menu Quest and npc for :Common Quest:normal,hardand hardcore:ex
Kill 103 Gnolls in 4 days.-Left:5365sec.Your kills:0 gnoll. Rewards:gold and exp,random normal gear(with title),piece.etc
-Quest:Kill 89 angels,91 bone dragons in 3 days.-Left:43176sec.Your kills:20 angles ,15 bone dragons-rewards:gold,exp,random pieces,gems, pieces gear(with title).etc...--------------You completed my quest!Your killed:92 angels ,95 bone dragons
You got exp: 526774--------------You got 257405 gold!-You got piece of the salamander(random bad reward :' )

gugugugu: 1.) Reward for top PVP killers(weekly)
- this would be very harsh, but PVP is a part of a game. It would be great if the top killer will get rewards. (e.g credits, gears, gold)
2.) Lucky Monster (weekly)
- A lucky monster will appear every week, everywhere in the B.D world, that if you kill this monster, it'll drop a high class gear, additional credit etc.
3.) Gear Upgrade
- its good to put an NPC that will be able to upgrade your gears (e.g The Centurion + 5) maximum of plus 10. And also there must be an item to use to upgrade your items (e.g Metal- an item used to upgrade armor, footgear and headgear.
Silver- an item used to upgrade your weapons)
of course the drop rate of these upgrading items must be low.