The page is now showing "We'll be back shortly. Our servers are over capacity". Now I'm really interested in which one they are currently using.
Many company and developer blogs? Hosted on completely different technology from their main web sites. Maybe not even hosted on their servers, but instead with a service - like this one.
Maybe we can avoid the increasingly stale snark about <web technology mentioned in blog post> not working so well when a blog post goes down under heavy load.
Doubly so when it's a freakin' iPad app, not a web-app being talked about.
Twitter has been having this sort of problem since always. Users don't seem to care about a little downtime.