Disclaimer : I'm not a developer. Heck, I'm not even good at maths. Take everything I say with a grain of salt.
As far as I remember, Chris Avellone said on his blog that while a position may not be open at the time you submit, they still may remember you when that position eventually opens.
...if you are in doubt you may want to just e-mail him. As far as I've seen, he's very open and helpful on this kind of things.