Your questions...not any clearer.

It could mean two things:

1. If I buy a tough cookie pack for one character on a certain server but i want to use it on another server will they ever make that happen?

If that's the question, then its already doable.

2: Will there ever be an item implemented that would allow us to move our characters from server to server?

For that you should turn to the Q&A thread that Ivramire posted earlier.

Hope that helps?

Yeah, but put it like this:
If they DO implement a server-switching item, It would be:
1. Avaliable, But it would cost some ungodly amount of SC, I'm talking easily $50.
2. It would probbaly be a one-time thing, Not something you could do weekly.
3. Etems you have from one server to another would probably get destroyed or something, To keep the balance of like, Event items and Teva weps to an equal amount on each server.