As far as I can tell, it's services provided over Plan9's '9P' protocol. The 'grid' word makes me think there's some level of decentralization involved, though it's somewhat unclear exactly how much.

I find it amusing and somewhat strange how many of the modern-day Plan 9 enthusiasts come from 4chan's /g/ board, this project included. Maybe it takes a certain level of eccentricity to value the elegance over most measures of practicality. Either way, I fully support it.