At Gencon 2004 Matt commissioned me to write some materials for A2089, which included a big sourcebook and some other things that I'll not mention here just yet.
A few months later a Mongoose employee asked me to get it in and finished ASAP.
I did so.
The project just... stopped soon after that, but the materials still exist. I never got paid for them, so I'm quite keen to see A2089 return for financial reasons.
I also like it because it's awesome.