Journey with this project is coming to its end. When a foundation is ready working on some "dressing" here. 404 page is meant not only be pretty but useful as well. Lots of us keen on this page to free creativity and imagination. In result, we have polished aesthetic with no extra help for the user. Luckily for a user, they got "Home" link.
So when it comes to a blog, reading experience plays a prominent role even on 404 page. That's why you'll find the hottest content on 404 page to keep a user in the reading flow for longer as it takes.
What is your attitude to error pages? Should they have more content modules? Or Notification about essence of error is enough?