Alas, everytime I join one of these things, the project shuts down. Ex: plugin for life. Thus the safest thing for me to do is simply promise to buy a copy of album when it's done.
It has to be something mystical about me, as I have the same problem when commissioning artists and house contractors. People get their half up front and then disappear. Shoot, Circuit City folded after 60 years the DAY I needed to use that extended warranty I bought -- to the day.