Wide screen is a good idea. Though this particular resolution would be very difficult to make work. Once you get above a certain size, the game kind of starts to break down, and the only thing that works 100% of the time is the menu. The hacks I've seen that don't crash tend to have problems with displaying graphics properly at resolutions this high (lots of sprite errors, tiles showing up in weird spots, textured bgs being messed up...). Though this may have been fixed by now.

More significant is the fact in offline mode, most objects that are 30 tiles away from you are removed (to see this in effect, jjnowall outside the edge of a level). This means any resolution that is too big in any direction will have problems. This can probably be worked around, but it would likely cause other problems in the process.

Basically, 800x600 can be hacked in without much of a problem (it's been done already), and so can others that are around that size; but beyond that, the bigger you get, the more work it takes.

However, this isn't going to stop people from demanding more and more, or demanding weird things like in the post above this one.