According to this question, the old http://odata.stackexchange.com URL is permanently disabled. Could someone change its error page to be more permanent? Right now, it's using the page with this text:
This Stack Exchange site is currently offline for maintenance
Routine maintenance usually takes less than an hour. If this turns into an extended outage, we will post details on the blog.
The outage is as extended as can be, and there are no details at that blog.