Jumping in here with a quick reply as a *lurker*, not a developer:
Don't think anyone would mind if you supplied patches :). You have to understand, with people still working on kernel things, making applications actually work, stop crashing, hardware support...
Most that would interface with screenreaders would *probably* be handled by WINE anyway. Is there something specific you have a problem with not working? If so, do file a bug report! But first check that the same fault doesn't pop up with wine under linux.