Ayase, the Aion Community manager,has released an interview about the details of MMORPG Aion Gold. 

1. What importance will cover the crafting and the exchange of items between players in the game world?

Our ultimate goal is to have all professions be important and "worth it" to pursue. The development team is still working on balancing the player economy, so I won't be able to comment it. There will be Auction Houses and player stores available to make trading easier, however.

2. How a master can be able to modify the several aspects of the clan? privileges, titles...

What I can tell you of the Legion system as it is right now, is quite limited due to its unfinished nature. You will be able to give different members different ranks, in order to spread out responsibilities.

3. About Crest customization, there will be a customization for title in the Legion too? (like the top 10 guilds in GW?)

A player's titles are acquired from accomplishments.

4. There will be a guild housing like on UO, fully customizable?

I'm afraid I couldn't say, yet.

5. Every Legion House can be placed only in some specific spot?

Same answer as last question, I'm afraid. Information about Legion housing will be announced if and when such a system is closing completion.

6. There's will be penalties for who kill low levels in low zones lvl(es.temporary debuff or loss experience)?

The lowest level zones will act as learning-zones and not be open for the faction warfare.

7. It will be possible to unlock new abilities after reaching a goals in the pvp (if yes, can you make an example)?

I believe that you will learn more about the PvP system along with the next phase of Korean CBT (3), where the Abyss and systems surrounding it will be put in play. I ask you to have patience with some of the information, as a lot of things are still being tweaked and developed until the last minute.

8. The pvp it will be opened to all the areas or only confined to some of they?.