During the last two weeks I have been working on adapting Mozilla's addons site to the Sugar needs.
After some fighting with php code and basing on previous work from David Farning, managed to install it in a virtual machine and write some patches so that AMO accepts activity bundles.
Bernie is going to resume the work where I left and I hope we'll have a test instance in a public server sometime soon. Then we'll need to give it some testing, fix the remaining bugs and customize the look to SugarLab's graphical identity.
Also, as we are forking their code, we are going to update regularly with upstream and maintain our set of patches, that I hope can keep small and not too intrusive. There are also some opportunities to upstream some work that can make this work lighter, as Mozilla is also interested in making easier adding new addon types.
So there's quite a bit of work left to do, but I believe that this project will give Sugar much more projection. I see as fundamental to our goals that it's as easy as possible to discover and install new activities and to publish new ones. If you have php coding skills, please give a hand!