The style of technical writing would be factual, easy to understand, have a flow to it, and possibly in the form of list to be followed.
Technical writing is an informative writing. How to do something, how something works, how you put something together and etc.
Examples of technical writings can be found in almost everything we do. When deciding on doing a technical writing, keep in mind, you know what you are talking about, and the reader doesn't. You should keep it simple to follow and have no ommisions. Calling it technical writing is almost a misconception, you need to be the least technical and down to earth as possible. For example, I refinish furniture. During the sanding process if I ommit the fact that you should use long strokes not circular motions, the piece of furniture is ruined. I know this because I have done it so many times, but the reader, probably refinishing for first time, wouldn't know this.
I would imagine publishing your technical writings on the Hubpages is a great place. I have often put in the tool bar of my computer something I need help with, and postings off the hubpages come up. As for specific venues for what you are writing on, not sure. Would think that would be topic specific, probably thousands of places.
My tips would be simply, step by step, don't skip around, make it very understandable by even your simplest reader and definately have fun...