im wondering when foobar 0.9 will be released (and its sdk) so that i can start development of a plugin that will work with it
i would start now but i dont want to make something that will only work for a little while

When it's ready. People should really stop asking the same stuff again and again.

"when it's done."
dude there's a topic for that and that question was asked there several times.
all got the same answer.

I wonder why I bothered writing this down (see "Public SDK").