Trion Worlds has announced that with the advent of patch 1.3, RIFT will allow players to move to select servers once per week -- for free. These free character transfers include a wholesale move of all of the character's items, achievements and titles. Also, Trion has stated that initially there will be no limit to the number of times your character can hop to a different server.
Scott Hartsman thinks this will strengthen the game's community: "MMOs are all about playing with your friends no matter which server they're on, and that's why we're offering this as a free service to our subscribers. RIFT is both a game and a service, and adding free server transfers is just one more way we can make this the best possible MMO experience available."
Patch 1.3 will also allow guild leaders to transfer over their guilds' details, including levels and experience. The patch is scheduled for "early summer."
[Update: Trion has posted a Free Character Transfer FAQ on the forums with specifics as to this service. Check it out!]