Well, that topic's a bit old and am not sure if it's still open, but I believe I'm qualified to be of help. I've been professionally working with statics/econometrics and analyzing financial data for more than 5 years now (1 year data Analyst, 3 years proprietary trading and am currently an investment analyst), so I don't think the excel part will be too much of a challenge. Despite that, I am totally new to ingame economics (didn't play a lot MMOs), so I'd need some guiding on that point.
Other than that, I am kinda lazy and don't like to do much in my free time (I don't like to do it in the office as well, but that's just how life is) , so I don't want to make promises that I will regularly be EXCELing with you, but I'd be glad to help when I have the time and the mood if that's OK ? (e.g. I'd rather help with specific ad hoc projects, rather than commit to do daily inputs etc.).
That being said I'll definetely be happy to offer some help and be in the spreadsheet squadron of TEST, because as a professional analyst, I wouldn't feel right if I didn't contribute at least a bit on that part.