You can do a million things for free online, you can have an incredible online presence without ever having a website, in this blog I am doing just that right now.  I will be on the social networks (Google plus, Facebook, twitter) and blog on the free online blogging sites (like WordPress and Blogger).

If you plan on doing something like this I would recommend that you have record of all of it, for example I have an Excel spreadsheet with all my online services with my login and password (and for heavens sake keep it safe and backed up!)

I plan to write a book and when it is done I will release it on the Kindle platform, this is a great example of an incredible system that is already in place for you, just use it!