We've recently started a pilot project to create an open-source developer community for 3ds Max SDK and MAXScript users at Google Project Hosting (http://code.google.com/p/3ds-max-dev/). Ultimately our goal is to to jump-start a self-sustaining developer community, to help developers more quickly develop scripts and plug-ins, and to flatten the learning curve somewhat.
I've seeded the project with versions of the template plug-in projects that I posted on my blog a few months ago, but are now upgraded for 3ds Max 2012.
If you have any open-source scripts or plug-ins that you would be willing to share with others, please consider joining the community and adding your content. The success of this community is contingent on your participation! I look forward to seeing you there soon.