9 million hits/day with 120 megs RAM
Blogs really don't need a PHP, Rails, or anything backend. It's static content.Here's how I think blogging should work:1. Visit a web app where you create your blog post, add pictures, use your rich text editor, that sort of thing.2. Click the "Publish" button, which generates static HTML and runs any other processing like tag generation or pngcrush.3. Your static HTML gets pushed out to some server that does the hosting for you. It could even be one of those really cheap shared hosting providers.If you really want comments, let someone like Disqus or Intense Debate handle it. Pretty much any dynamic feature you need can be outsourced.