Kazu has posted the Flight Explorer cover (drawn by Jake Parker) to his website. In his blog, Kazu says:
I’m excited to finally be able to tell booksellers that yes, we do have a book that’s completely appropriate for the youngest readers and know that there’s a considerable amount of love and care put into it. This will be in stores right around the time Amulet and Jellaby hit, so the Flight artists will be showing up with a ton of kids comics at the beginning of 2008.
Flight Explorer is scheduled to be released in March 2008, and can currently be pre-ordered through Amazon.com or other online booksellers.

[...] And if that’s not enough, there will be a new full-colour Jellaby story, “First Snow,” appearing in the pages of Flight Explorer, which is set to be released at the end of March 2008! You can also pre-order the anthology through Amazon.com. [...]