I highly recommend Jekyll and other static generated blog engines as they can handle high traffic and don't suffer from security problems. Hit me with an email if you need any advice, happy to help out.
It's really affordable for personal sites, and for static sites like yours you'll be getting 98%+ cache hits – almost no traffic will ever hit your Dreamhost box, it will all come from their highly optimized Varnish caches around the world.
Learndot's blog is hosted on a ec2 small instance fronted by fastly, our launch article was on HN/Techcrunch/etc... simultenously and we never went over 10% cpu.
tl;dr: Use fastly.
Edit: Looks like Danielle thinks so... she signed up with them a few hours ago. https://twitter.com/DanielleMorrill/status/28918229241967411...
TL;DR: Use Varnish.
*Minor edit