I recently sent out a book of infrared B&W to Blurb, using appropriate color management. The printing was great, but ruined by POOR quality paper! I will not use blurb again until this improves.
I printed the same book at mypublisher.com, with much better results. Heavier paper with a slight gloss. The tone wasn't quite as neutral (appears selenium toned to those of us that used to do that) but the overall quality was much better. And much less expensive, too!
I'm looking for something better, but haven't found anything yet that doesn't require extensive time setting up the pages. Let me know if you do!
Paul