Because it's fun to say.
Melissa Wiley coined it; Wands and Worlds used it; since I'm the third person, that makes it a real word, right?
Oh, yep, must use it in a sentence.
This weekend, the kidlitosphere will be reading and reviewing in response to MotherReader's 48 Hour Challenge.
It's official. Kidlitosphere is a real word.
Edited to add another user: Suitable for Mixed Company.