Although hosting on GitHub pages is an excellent option, I decided to move this blog to Amazon S3, mainly because I have used S3 before. Also GitHub pages only supports a limited set of Jekyll plugins and I wanted more flexibility to add any plugin and (potentially) run a different version of Jekyll.
I also took the opportunity to switch the theme to the rather minimalistic but stylish Poole and installed the useful s3website utility to automatically synchronise the static site to Amazon S3. As you are charged for upload/download traffic, an intelligent sync process (rather than uploading everything) for deployment is important.