I have been running my own software product business full-time since 2005 ( products: www.perfecttableplan.com and www.hyperplan.com ) and blog about the software business at www.successfulsoftware.net.
I have a sideline in consulting to other small software business, particularly on marketing.
I run a course in the UK for people who want to learn how to bootstrap their own software product business.
I am a moderator on Joel Spolsky's BOS forum.
More about me here.