I must admit I didn't think this would be news. I only turned it off because (in the grand scheme of things) no one was using it. It would not be a huge deal to resurrect it but it just wasn't making any sense by the numbers so I turned it off to focus solely on my newsletter publishing business :-) (A bit like 37signals with Sortfolio, except coder.io wasn't making a penny ;-))
If enough existing users are bothered by the shutdown, I could look into re-enabling it in January.