Things that wouldn't need to be resized:
Tiny creatures (ants, beez, etc)
Weapons (you have more room to differentiate between a HUGE (bone crusher) weapon and a regular one, just center (image magik) it and if its 2 handed maby give a longer handle, easy).
Equipment.
We would need to have a client where the whole screen was mostly map and then press a key to bring up inventory (and have a mini inventory screen on the side to see what you are equipped with but only the pictures), SDL

We also need music and sound mixed as otherwise they will block eachother. Would be nice to beable to specify the music theme in a mapfile.