I have just installed the following add-ons kindly developed by @burt:
1. Blog / Article - integrated blog / articles, controlled via admin and seamlessly presented inside your store.
2. Write Testimonial - customers can now leave testimonials.
2. Testimonials box - displays any testimonials in a box
3. Product Out of Stock - replaces Add to Cart button with an out of stock button. An out of stock message appears above. Common sense solution.
4. Schema Local Business - so your business details can appear in Google.
Installation was simple. In all it took me less than 20 minutes to install and test all 5 add ons.
Highly recommended. Links to all add ons are in @burt's profile.
The blog / article add-on was precisely what I was after.