Indeed, getting a common file format is not that simple as it may sound

with little effort you get a format that is perfect for 90% of the cases and then all the subtle differences come creeping in adding complexity over complexity over complexity.
and the last 2% is almost impossible to achieve, resulting in a format that is not 100% right for everyone and possibly too complex for 90% of the cases.
It's like Cirix said: sometimes you just get tired of it and you move on the other projects

on the other hand, a game like boulderdash is game that gets into your head and never leaves. I still play it and still use it once in a while as developer.
like on http://inca.stef.be/ - an emerald mines engine in flash which also uses the BDCFF format.
I still plan on converting all the caves on http://www.emeraldmines.net/ to this format and have some webbased engine there able to play all the levels (with a webbased level editor like http://inca.stef.be/editor.asp )
so, for me the BDCFF is "good enough" as it can hold 99% of all the emerald mines levels.
I'm all into webdevelopment now so everything I do will be for the web, no more desktop programming for me.
thanks for shaking the tree again, RAP!
I'm going to read the rest of the forums now to see what I've been missing