IEOC and Recommended Reading
We have a vibrant online community over at IEOC, and it's only getting better as recently I've gotten commitments from a few CCIE Voice individuals who will be answering questions along with me, regularly there. So come one, come all, and post your questions relating to CCNA Voice, CCNP Voice and CCIE Voice.
Some of the more pertinent (Voice) forums are:
CCNP Voice (CCVP)
CCIE Voice General
CCIE Voice Technical
Also, if you are not aware, you are able to 'subscribe' at the bottom of each of these forums, and once you do you will receive emails for every new post (or digest if you so choose), making this a great combination mailing list and online forum, and you are free to use it either way you prefer, or even as both, as many do. You can also simply reply to any email, and it will automatically add your reply to the online forum thread, as well as alert all other members via email. You can even start new threads by simply emailing a new subject and body to the particular forum's email address (once you get your first email from any given forum, you will know where to send new emails to start new threads).
We are highly committed to continuing to build IEOC into being the preeminent Voice online support community, just as it has been for CCIE Route/Switch for years now.
Finally, we have recently updated our Recommended CCIE Reading Book List. Head over there to check it out when you have a chance.