QA is probably just not testing on FF because of user share. And if it's not going through QA, you just don't support it as bog coorp...

Interested in this as well. I don't see why it wouldn't work as described by the pro-aggregation side of the discussions.

My thoughts as a user first, dev way later:

• All links should be fully qualified by default. This way, sharing a post or community is straightforward.
• The default view of a community /c/foo should be the aggregation of all the posts of all the linked instances' /c/foo communities.
  (If you only allow trusted linked instances, moderation should not be a big issue in the beginning. Because a rogue instance with potential spam wouldn't be linked, right?)
• The default view of your frontpage should probably also be All instead of Local. Because it's just less confusing for a new user. I suspect you first want to read and see what's going on - before you want to settle yourself in a community ...

What are your thoughts?