We used to have the data for the "online" meta via OCTGN's data dumps over at slaghund; by checking consistently over time we could break things down by date, which was really cool. It would be really awesome if FFG's tournament software just did things (and bonus points for uploading the data to a central service like acoo.net but with the level of detail that NRDB has.
I've asked a couple of times for similar data via jinteki.net, but haven't heard anything about it. But then I've heard all kinds of bad things about playing on jinteki.net so who knows if that's good or what.
But hey, I do this sort of thing (online data and game services) for a living, so my expectations are... high for what is a pretty small product, I guess