We have begun migration of most wikis to our new host, Amazon Web Services. All but the top 100 wikis are in read-only mode until the migration is complete. Estimated completion: End of Week.
Points are gained by editing pages on the wiki. To view your current level, visit your user page. There are many levels. You can edit pages where you see  next to section headings. You can also click the Edit tab in the upper right corner if you do not see any  buttons. Respect the rules when editing, creating, etc.