Executive Editor of the IGN Vault Network, Rosethorn, posted a preview, over on Camelot Vault, discussing the "... future plans for Dark Age of Camelot, covering things from the free housing expansion coming in the next month or so, to the Trials of Atlantis Expansion announced just a couple weeks ago." To learn more check out the full preview, for now here is an excerpt:

One of the more exciting elements of the new expansion is the underwater levels. These will only be available in the new zones added in the expansion. There are a lot of special effects, like lighting and bubbles, that require the new zones. When underwater, players will always be swimming. There is no weighted walking. Swimming is 3-dimensional, and sometimes monsters above or below a player will be unfriendly. There is an underwater equivalent to horses, in the form of sharks. These will act just like horses, allows players to purchase rides from merchants. One of the areas which were shown in the demonstration was an old sunken ship which can be entered through a crack and explored. When the expansion goes live, there will be many nasty monsters in that area ready to take players out.