It's great that so many of you comment and share links to products, technologies, articles, etc.
There is one common problem with linking.
A lot of commenters link like this: http://example.com/product/model/xyx.html
This wastes space, disrupts the flow of the comment and looks ugly.
Instead do: XYZ model. You type in the text ('XYZ Model'), then highlight it and then click the paperclick button at the top right of the editor.
You then get an overlay, type in the URL and click OK, like so: