There seem to be a lot of people excited about the server emmigration event on the main forum, and I noticed a few posts here as well. I'm not sure I understand why people are so excited about moving. While there is a small chance that you will be able to find some niche that hasn't been filled on a new server, and you may be able to make large amounts of gil from it, think about what you will be leaving behind.
I took a look through the Ragnarok's Finest thread... There are a lot of familiar names in there, and there are quite a few helpful people on our server. There are people you have partied with in the past, who you may not know very well, but still give you a /wave as you run past. People you have helped in the past who are willing to return the favour. Chances are, many of these people will stay behind. If you choose to move to a new server, you will spend a significant amount of time meeting new people, and trying to build new friendships. I've been finding my AF quests difficult enough with the large number of friends I have already made on Ragnarok. I can't imagine moving to a new server, where I only know a handful of people who have moved with me.
To anyone who is thinking of leaving Ragnarok, I ask that you think long and hard about what you will be leaving behind. We have some great people on this server. I am proud to be from Ragnarok, and I would hate to see our world lose some of the nicest people in the game!