Dave Bill Kesel has it right, I think:
"Dave would like to be a pro surfer -- but very few actually make enough money surfing to survive. Many would like to blog or podcast professionally, but very few will actually make it big."
Dave is a surfer who's arranged his life so that he can drop everything when the surf's up and hit the beach. He wants to be a pro surfer, but realizes that almost nobody gets paid enough to surf full time. He points out that "it's almost impossible to have a reasonable perspective about something you're passionate about" and therefore bloggers and podcasters should keep their day jobs.
I agree that podcasting as a full time job is still way out there. Blogging, however, has come into it's own. There are many "pro bloggers" meaning bloggers that write full time, but I will admit that there are probably more who waiting in line.
This Dave guy is so quotable. I'l leave you with this last one (which I haven't really figured out if it's deep or nonsensical):
Via: Blogging for Business: The Future: It's a Non Mainstream Fad with Value
"It's a fad...but that doesn't mean there isn't any long term value,"