>>210
I've occasionally thought about implementing a macro language for befunge, perhaps similar to brainfuck's Pebble. It could be useful since befunge offers very little in the way of abstraction.
I haven't really thought about this in any great detail, however, so I'm not sure how it would work. I'm not even sure what the exact goals would be. I'd be interested to see what thoughts other people have on this matter.
The main downside to this is, that I can foresee, is that it then becomes harder to write self-modifying code: you don't know where things are going to be or their precise layout.