The little aliens that appear underneath the usernames are 'rewards,' so to speak, for longevity. The more you visit ASciFi and the more you post, the more aliens you acquire. The aliens are 'awarded' based on the number of posts you have made at the site.
There is a thread in the General Discussions section, under the sub-section "Post Clubs and Alien Threads" that lists the number of posts required for each alien. (apologies for not have the link at my fingertips, but I can drop it here if you'd like)
and feel free to head over to either "ASciFi Announcements" or "Gen Discussions" and ask any other questions you might have.
As for S6 on DVD - yeah - it's probably gonna be a while. Tho region 2 will see it LONG before region1 --
