Actually Level 9 is going to be a QUAD size map
WotC did reply to me, but no c&d was issued. Basically it said thanks for your interest in WotC products.... blah blah.... whatever. The way I see it, we're making this for FREE to be used by dungeon masters and players around the world so no harm no foul imo.
I looked at the "Dungeon Under The Mountain" maps published by 0one games a little while back and I was duly impressed with them. So much so in fact I purchased the first level map and promptly emailed the webmaster asking what program was used to make it. He told me Illustrator of course! So hence why I began using Illustrator for my maps.
I'd like to say thanks to everyone who has commented so far. It's appreciated