I have written about technical things (how I choose technologies, what to avoid, reasons I went from language X to Y, etc).

I never had any interesting social interactions from the blog/writing and the internal pressure to keep it updated eventually wore me out, so I got rid of the blog.

I have considered distilling everything into a book, complete with a working application. I'm more interested in the technical aspects and I am unsure if it would be of much interest/use to people.