I liked KQ too, and am a little disappointed it isn't doing 4e support (at least, right now).
I think part of the problem is that the support "magazines" for 4e, Dragon and Dungeon, are at this point free. It would be difficult to convince people to pay for 3rd Party support while official materials, written by the game's designers, are available at no cost.
When DDI switches to subscription mode, I think it will become much more attractive for a 4e periodical to start up, though likely not by one of the Big 3PP's due to the GSL.
I wouldn't be surprised to see some fan-based publication starting though (which, I guess at least some of the Big 3PP started out as too). I think a lot of gamers would love to be designers and developers too, and they need a place to get started. Dragon and Dungeon is one place to make submissions, but other outlets will spring up I imagine, as there are only so many pages in an issue to fight over. They already pore a lot of time and energy into their efforts with no chance of payment - just look at the Fan Creations and House Rules forums, or my own efforts with the Pre-release Rules Compilation. For these kinds of amateur writers and designers, the GSL isn't likely as imposing as it is for companies that have existing large overhead and many employees to worry about. Quality of course is variable, and you'd need a dedicated group of volunteer editors and desktop publishers to take the submitted PEACH'd material and assemble it into good looking PDF's. Making money for these people is less important than getting 'published' and noticed by potential employers. How many WotCers got their start in Dragon and Dungeon, after all, and I doubt they were making their whole living off RPGs at the time?
Verys Arkon
4e PrRC Compiler