As of writing, the latest update was given at 8:20 PM EST by Amazon themselves in this article. Essentially, everything that was affected by the temporary AWS maintenance is back up and running again except for the services AWS Config, Redshift, and Connect. The reasoning as to their continued maintenance was said to be because these services in particular have a backlog of messages to sort through since they went down. Amazon will be sharing a "detailed AWS post-event summary" in the coming hours.