Thanks Jim...I emailed a response to you on this.  Just to clarify, for the
O2 sensor reading I used a digital automotive multimeter (a good one) using
millivolts.  I rounded the figures in my post.  The in-dash unit is just
there to monitor trends whilst driving.

If anyone out there is using or has used a wideband O2 sensor for tuning,
I'm interested in feedback on the PLX (http://www.plxdevices.com/index.htm)
units or the LM-1 (http://www.innovatemotorsports.com/index.html).  I've
been musing over these two for a while...just having trouble getting
motivated on the expense side.  They run from $300 to $700 US depending on
options.