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.
While everyone who wants to contribute is encouraged to go ahead and make an edit, this section is here to accommodate more general suggestions, such as sweeping changes to overall article structure, or changes that aren't available for the public to edit, such as the front page, the wiki's CSS styling, etc.
If you'd like to make a change but aren't sure of how to go about doing it, you can check out the Gamepedia help pages which have all sorts of helpful editing tips, but feel free to post your idea here in the meantime.