I am currently developing an open source blog program called The Embed Blog, which can be added to an existing web page. It would be amazing if you could try the blog and let me know what you think about the development so far.
You can download the blog from here:
http://www.web-creative.co.uk/projects/embedblog.php
The blog program requires a PHP server with MYSQL database, but if you don't have access to a server you could view the locations that I've already installed the blog.
Simon Woolverton's Blog - The Embed Blog
Static News - Embed Blog Micro
DBBT News - Embed Blog Micro