I believe that a gameplay recorder would be a good addition to DoomRL.
Every roguelike player - and indeed, gamer - has had times where (s)he has played the most unexpectedly good game of their life, but only has their word to back it up. With a recording feature in place we can add new life to the postmortem board by adding a video of the best moments of gameplay and the final demise.
"But videos take up a lot of space!" I hear you ask.
Not necessarily. I believe that it will be possible to create full gameplay videos in a tiny amount of space by rendering the videos in DoomRL.
How it can work is by instead of recording the positions of everything on the screen, either in a text file or by image, the recording function would rather record what happened inbetween turns.
Say you have a 10x10 room with a boarder around it, one marine in the center and 10 barrels scattered around the map. The marine moves one step.
That is all the recorder would need to record. Video recorders would take the time to note the positions of the barrels AND the marine, but by working off the difference of the first round and the second round it would be possible to post an entire game in a tiny amount of space.
I realize that I have been rambling on for a bit, I have just had difficulties clearly describing it.