Regarding blogs, I am a guest author at www.soeren-hentzschel.at
It is mainly a Mozilla-related blog but my part is to publish technical blog articles like tipps for linux, php and so on.
The blog is quite good at google searches and google recognizes new articles in less than one minute after publishing.
I asked the owner and he allowed me to post a blog article about ISPConfig if we produce a (german of course) text, that is nice to read and not PR-style.
Maybe we can collect some headwords for an article and some comparison to other admin panels like plesk, cpanel, .... here in this topic.