@Paul: Speaking of filling... What are you using for this? I had no luck with the Revell putty and only limited luck with Mr. Surfacer 500.
@Tat: Thank you! I use a piece of sponge saved from some furniture packaging but I guess kitchen cleaning sponge would work just as well. The "secret" is to dip it into some paint, sweep off most of it still leaving more then you would use with the dry brushing technique then _lightly_ dab it on the edges. Insist where more needs to be accumulated. Additionally, you can start painting larger chips with a fine brush first then apply the sponge. I think the most important thing to keep in mind here is to really dab the sponge and/or brush and not drag it on the surface. Dragging it will lead to less realistic results, I would say.
@Dave; The rules we made up say that you are allowed to start immediately provided your kit is not more than 50% ready. We additionally considered a second rule that says it needs to stay below 50% by the official start date but that is being scrapped as it won't make much sense. So go ahead and start whenever you like!

The end date is as listed on the campaign page October 1st, 2016.
As for the subject, this has been thought as a land and hybrid vehicle campaign so I would say, yes to AFVs, yes for armored/military trains but no for airplanes and ships. The Dora seems to be a nice fit for this!
@Delbert: Nice choice! Looking forward to seeing more of it!