Bump. I've just started playing with
Torque, which is an Android app that reads from an OBDII -> Bluetooth adapter. I already had my phone's car dock mounted in the cubby area with a semi-permanent USB power connection to use it for Google's GPS Nav stuff, so this makes really good sense for a cheapo OBDII data display as well.
But yes, while the "standard" PIDs give a lot of useful info, there are several others I'd like to have access to that are Nissan-specific. According to
Wikipedia, the data generally isn't public, and you have to pay for a $7,500 membership to some stupid organization to get a list for "most" manufacturers, which I'm guessing is secret.
I'm going to keep digging around the internet, if anyone has any ideas for finding Nissan PID lists, please speak up