I have tried integrating these types of blog software into a xara site and frankly it does not work, AT ALL. If you really must have a blog with a xara site then the best way to do it is to install wordpress in to a folder so for instance www.yourdomain.com/blog, and then just link to it. Trying to install using scripts etc or iframes is neither good visually or from a practical point of view. If a client needs a blog we simply do the whole site in wordpress, as Acorn suggests above; it is simply easier. I have had a look at the nibbleblog site and to be honest trying to get it to work with xara will be difficult.