It's funny; that's what I ended up doing shortly after I posted this
question. I have a custom view where I made collections for reporting
the dates on tasks with particular milestones. Then, I output the Report
into Excel and did the calculations there. I just needed the data and
didn't want to totally break my brain. Although, that would rule as a
custom form field for calculations and the like...oh well, the beat goes
on. -j