Bit of a dull post but just a note regarding colour profiles/management. I'd been working in Adobe RGB during photo editing, so I needed to convert my final PSDs to sRGB ready for the JPEGS to go into Blurb's software. I also downloaded their ICC profile in order to soft-proof my images in Photoshop. Although difficult to say for certain whether the images will be ok in print, the soft-proofing gives a good guide.
My colours, contrast and brightness seem ok, and I am inclined to trust my screen as I made sure to properly calibrate it. The book should be sent to print sometime this coming week. Initially i'm only ordering one to ensure it looks fine.