Blog Talk Radio is a free, live, and recorded broadcast station owned by Google. Sign up free as you would for any other social site.
I recommend small business owners and and anyone with something to share get signed up and go for it!
Within minutes you can be up and running.
Choose a show name.
Upload a picture.
About you in profile.
Choose your first show subject.
Pick a time and date.
Since Google owns BTR...you get ranked well.
Be sure to choose quality keywords too!
Remember to have fun and be passionate about your expertise. Don't worry about being perfect...People are not attracted to perfection...they want to connect with someone REAL!