Update: I received my ELM327 OBD WiFi adapter (this one:
http://www.amazon.com/gp/product/B00AOIM2CC/ref=oh_details_o00_s00_i01?ie=UTF8&psc=1 ) and I downloaded DashCommand from the App Store ($9.99). With this I get a pretty nice interface on my iPhone, and one of the parameters I can use is boost/vacuum. It behaves just like I'd expect based on driving other turbo cars with boost gauges. During a quick black on the highway today I saw it maxed out at 15PSI of boost, which seems about right since I'm running 87 octane these days.
I plan to set this up with an iPad, since this OBD adapter takes my phone's WiFi, so it's not online while I use it for gauges. Another option would be to spend some more money for an Apple-compatibile Bluetooth OBD adaptor. I haven't gone too far with the setup yet, but this iOS app works, and also FORScan (
http://forscan.org) worked on my MacBook Air under Windows 8 in VirtualBox. That has some options to view and log parameters live.
No listings for oil temp or pressure that I've found yet, though.