The publishing industry has been revolutionised by the digital age.
Computer technology has impacted on print media in many ways:
Fewer printed publications are selling
Advertising is more difficult to sell in print media
People now seek information more on the internet, and less in books
Even free to air broadcast media has been impacted, and with increasing dissemination of programs via podcasts, internet etc; the broadcast media seems set to be impacted even more.
It is now possible for just about anyone to produce and publish electronically.
Publishing a web site, podcast or e zine is not just a matter of being able to use a computer though. To be commercially viable, you must collect together a variety of skills (eg. marketing, writing, graphics, technical/programming, etc); either employing others, taking in partners, or learning them yourself.
If you want to develop a career or be active (in some other way) in this industry, a good starting point might be the
ACS Certificate in Electronic Journalism.