While updated internally, the core version of the site was reaching it's end-of-life and would not receive further updates. So the decision was made to do a core update. But ouch, the site update went South. Way, way South. Ended up with database complications and now the pieces are being picked up and sorted out. Some areas can be added back in manually. Some - not so much.
Work has started on getting the base site operational again, beginning with the more popular areas like the Firefox Addons area.
Unfortunately, if you previously had an account you must re-register again. We apologize for the inconvenience.