I've added RSS feeds to my site (or more accurately I've put a link to it on the home page, as it's been there since the site went live), and also incuded the possibility for a category filter.

I thought I would test out a HABTM relationship by adding categories to my blogs. At the moment this seems to work as Has and belongs to Many+, as categories are displayed as being associated with all posts even if they don't actually have a link. I assume this is a simple error on my part which I will correct shortly.