The Magento plugin / extension recommended by the Varnish publishers, albeit in a blog post in September 2012.
Article from Varnish Software about magento plugins, recommends the Phoenix one...
Really interesting service that builds an instant "loyalty program" which tracks users points for various actions on a web site, creates a league table, allows for paid out rewards, and so on. Very interesting.
Useful posts from Antonio Ramirez on the Yii framework. This is the category, there's quite a lot of helpful stuff in there.
DollarsBlog is a blog aimed at professional bloggers. Potential affiliate for wppro business.
BuzzBums is a blog directory. It costs $1 to join for a minimum of 25 years. They aggregate content and offer aggregated feeds for member blogs.
Amatomu is a South African blog aggregator. Users register their blog with the site and then it tracks popularity, traffic, reach, etc. It's purely for South Africa.
b5media is a blog network company. As at Jan 2008 they have over 320 blogs in 15 channels and over 10m unique visitors a month. They user WordPress standalone for all their blogs and manage monetisation centrally.
XFN (XHTML Friends Network) is a simple way to represent human relationships using hyperlinks. Recently, blogs and blogrolls have become the fastest growing area of the Web. XFN enables web authors to indicate their relationships using rel="me" etc.