If I might make a suggestion:
Starting off with a subforum for each coin is going to cause problems when you've just launched. Limited membership and low post counts plus a dozen subforums is likely to result in a stale community. Don't divide before you need it. Definitely have subforums for BTC and LTC, and maybe a few of the established alts, then keep one subforum for new alts, maybe one for alt launches, and one for general alt chat. If one alt's topics are taking over the subforum, then pull them out into their own subforum. If you split them early, people won't want to post because they see no community. Build the community first.
I'd also rearrange with established coins on the top, then the alt forums, but that's less of an issue.
/My 0.02LTC.