Digital BW, The Print

Regarding OBA detection:

There are a couple of ways to check if you have a colorimeter or 
better a spectrophotometer. Simplest is to measure the L*a*b* of the 
paper white and see if it tends towards blue. Second is to take a 
spectral based reading of paper white, and then make a graph of the 
values (programs like Xrite's ColorshopX makes this easy). An example 
from Colorshop X in the color scratchpad "tool" looks like this: 
http://img.photobucket.com/albums/v329/Greg_E/Intelicoat17mil.jpg

You'll notice the hump at the blue end of the spectrum which 
generally indicates that there is OBA present. The sample is the 
Intelicoat 17 mil cotton/poly canvas material. Papers like Enhanced 
matte have a huge hump at the blue end.

And yes ColorshopX works with the i1 spectro, as well as many Xrite 
measurement tools. The above was made with an i1 pro "new" generation 
of spectro. Also works with the old DTP22 Digital Swatchbook that you 
can often find on ebay for a few hundred dollars. Complete overhaul 
of a real DTP22 is somewhere around $400, but Xrite won't work on 
the "generic" OEM type Swatchbook, so be aware when you are buying.