The OpenSolaris community is very active at the moment, partially because it's a comparatively new project, but mostly because it is a very interesting project. You have the bulk of the Solaris community on board and interested and you have dis-illusioned Linux users who want to use an OS with a longer heritage.

That's lead to a lot differences of opinion on the dicussion groups, some unsurprising OS religious debates but on the whole a lot of good discussion on what is wrong, what is right and still needs to be done.

This is a relatively new area for the open source movement. Most open source products started out that way, here we have a 20 year old commercial product, and a very successful one, and are making it an open source project. That's a big undertaking and its likely that some lessons will be learnt.