I updated the Novvocu section of the web site with a summary of all the notes I've pulled together on grammar so far. I also updated a spreadsheet of Novvocu terms, but that's not ready to be published yet. Finally, I read a lot more about Japanese, which is a great influence right now. For instance, vowel clusters in Novvocu are pronounced as in Japanese, where each vowel in a cluster has equal weight and is pronounced as if it were a simple vowel. Vowel clusters are not pronounced like diphthongs. So duos, "two", is /DUU-ohs/, not /dwos/.
I've also been thinking a lot about an expansion and revision of the particle system, but I want to do some more reading before I reach any conclusions.