I just bought a conzult interface from PLMS Developments http://www.plmsdevelopments.com for $137. All I can say is WOW!!! I've a broken screen toshiba laptop and a 7" widescreen touchscreen lcd fitted in the dash. It shows 12 configurable gauges that display analog and a digital readout IN REAL TIME. Definately the best upgrade I have bought. I've been to 5 Z shops around including Nissan and none have been able to give me the diagnostic info that I've needed. Now I can tell THEM where to look. CHECK them out at the web address above.
yeah, datascan is great piece of software. datalogging and all, for $30 (for software, then $100 for interface, or make your own). well worth that small amount of money. gonna fit screen in myself at some point.