From what ive read(someone correct me if im wrong). When, or shortly before, CB is released there will be a webform to fill out that lets you reserve your name, crystal count, and guild. Weapons will not be transfered but you can sell them back for crystals. Crystals will then be transfered into tria.
Items will be cheaper in CB. ie. 350 tria for a good steel sword i think it was. Right now items are just status symbols and decorative trinkets. They serve no purpose, and you dont -need- them.