We have already come a long way, including creating a test server, with a character able to walk around a map, as a proof-of-concept. What we are most in need of now is pixel artists to create still tiles and animated sprites. Concept artists are also welcome to design the look of the world.
If you want to help out then visit the forums for more information.  

http://whispersofavalon.freeforums.org/index.php

NOTE: Content for the game is GPL licenced, but we may accept art licensed under Creative Commons or Public Domain right. For more information read this thread.

Website: http://whispersofavalon.com/
 

 Update: The Project is dead, but I'll continue to work on the tilesets and sprites whenever I have the time