It's a tempting market, but I never tried to enter it precisely because I perceive it to be saturated. Whether it really is or not is yet to be determined (statistics and feedback from insiders), but there is another reason why I'm vary of going for it.
It seems like nowadays a lot of people getting rich online or just making decent money are doing so by talking about getting rich. So it seems like a catch 22. How many of those people have actually built successful online business prior to the one about building successful businesses?
The idea goes on my nerves, to the point that if anything the reason I don't want to enter that market is to prove that I can make money without talking about making money. Similar thing goes for webmaster sites. Building successful websites about building successful websites.. Another catch 22.
In short it seems too easy.. too cliche... and therefore probably too saturated by now.