The registration on LimeWire.org is broken, and we're really not too sure how to fix it. Fortunately, it's not necessary at all for involvement in the open source project. All source is available via anonymous CVS access, as well as from clicking on links throughout the .org site. You can also join the developer mailing lists.
Take a look at:
http://www.limewire.org/project/www/MailingList.html for information on how to join the mailing lists (dev@core & dev@gui are the more active ones).
Information on how to access the source is at:
http://core.limewire.org/servlets/ProjectSource and
http://gui.limewire.org/servlets/ProjectSource , found from clicking on 'View Projects' -> 'limewire' -> either 'core' or 'gui' -> 'source'.
Thanks,
Sam