In about 90 minutes, the Eve Online servers will be going offline to be updated for the Retribution patch. I do not believe the API servers will be online either, so while CCP is updating EVE, EveHQ may return error statuses when trying to fetch character or corporate data from the web service API servers.
When will EveHQ get updated with the new/changed ships and items?
EveHQ is dependent on the database that CCP publishes in order to source its information for fittings, skills, etc. So, once CCP finishes their update to EVE and publishes the final Retribution data drop, the work will begin on updating EveHQ with this information and have a updated release (2.11.3) published ASAP.
Now, hopefully CCP will finish their update on time, so I can begin working on my tasks when I wake up in the morning (-8 GMT is my timezone).