the converter for yabb 2.0 works fine (for a converter) it does require some tinkering to get it working with 2.2.x which is what is in use right now, and major tinkering to get it working with anything newer, but there is a mod that mostly works
you can request, but its not like the smf team is going to drop everything and get right on it, if there is someone else who knows how to do it and has a need to do it then they just might volunteer to do it, it may be tomorrow, it may be well over a year, it may be never as in the case of the yabb 2.4 converter where someone forked out money to an outside developer to make it