Here is a list of websites that I thought may be helpful for starting an online (or in so cases any) business:
www.websitemagazine.com – I found many little insights and learned some of the online trends from this site.
www.problogger.net – simply the best advise for business and individuals on every aspect of blogging. A favorite in my research, I even bought their book. Ironically, I have not visited the site in several months.
www.bplans.com – based some of my business plan outline from this site.
www.entrepreneur.com – many resources and advice but beware of your research cost.
www.irs.gov/business – I went straight to the source to learn more about what a Limited Liability Company was and how it effected my taxes. It was a good place to start when learning about the different types of companies that you can form.