WordPress Integration
I know this suggestion is a very tall order. Surprisingly enough I found out that WordPress does not have a good wiki system. All plugins are basic. WordPress has grown a lot over the years and there are good community addons for it now. Google has shuns forums and SER for forum software is very low. WordPress sites are growing while forums are declining.
IMHO VaultWiki would be an good suit for it. And it would open VW up to a massive customer base. It could be well worth it. Think about it.