If you're interested in directly contributing to nubbl, I'm always looking for talented designers, marketers, investors, and sometimes developers! Drop me a line! joe@nubbl.com
Otherwise, the best way you can help make nubbl a success is to share it! Share it on Reddit, YouTube, Twitter, Facebook, with friends, family, and maybe even your local games store! The more people who join nubbl, the more useful it becomes for everyone. And you'll be doing the community a super solid favor, so thank you in advance. :)