I knew this question would come! :p
I already know the basis of mode 7 but I'm still on a learning process. If the question is, "are you going to make the airship script?", the answer is no. Unfortunately, mode 7 makes rmxp lag :-/
There are numerous topics about it and mewsterus has already made a mode 7 script (called mode07). This was a really good start but no one has find an efficient way to manage mode 7 with rmxp. RGSS is too limited for that.
Unless someone suddenly appears with the ultimate solution, I won't even think about making it.
I'll concentrate on the battle system which is the harder part of the SDK.