So, I'm one of those dreaded XBOX 360 users who will be invading your guy's world in the near future. Since they are allowing us to take our beta characters with us, I am coming to you as a level 30MNK/19DRG/15WAR/1RNG.
One of the things that many people don't realize is that while most of us are spending our hard earned gil on item to sell on the new servers, we are also spending an aweful lot of time farming and, at least for myself and some of my friends, I'm completing as many gil quests as possible... especially the Selbina Clay ones. Why? Well, because you get the same amount of gil no matter what server you're on... Hydra or Shiva, but on Hydra, 10,000gil buys me an aweful lot more merchandise than it will on Shiva. Therefore, I can turn a 10,000gil quest into 30 or 40 thousand gil relatively easily. A stack of wind crystals sells for under 1000gil on Hydra. I'm also farming beehive chips, silk thread, bat wings, various seeds, etc to bring along with me.
There is a very good chance that Shiva will get a lot of the XBOX 360 migrants because there are only two servers listed on the first page of the world migration list and Shiva is one of them.
Also, woodworkers may like this, but logging areas are not crowded at all on Hydra so a lot of people have been doing nothing but logging to save and sell on the new server. I capitalized on this a bit by going to Carpenter's Landing to buy hatchets for 315gil each and then putting them in my bazaar, I go to Ghelsba and just leave my character sitting there overnight or while I'm at work. Always, I return to find three dozen hatchets sold for 600gil each... a profit of roughly 10,000gil. Not bad for 15 minutes of setup before I got to bed or go to work.
Anyway, enough rambling. I'm looking forward to the migration. Hopefully you guys are welcome of us newcomers... some servers certainly aren't.