Yes, we are taking things into consideration.
Just to let you know, I did the first part of my career in the multimedia industry, and included consulting for a company that did a lot of printing of different kinds. Color callibration was one thing that I was often involved with.
Spot-color is one thing that I know and will make sure gets in. Another thing is how complex color separations are, and that there is no such thing as a single "CMYK" colorspace.
So... you can take it that you print fellows have an advogate in the develpment team, and won't be overlooked. Of course, as Bryce mentioned, the feature requests are one thing we can use to both gauge end user desire and to ensure we don't overlook aspects as we implement things.
--------------- Jon thanks for your comments on the spot-color plans for Inkscape. I'm pretty sure that Inkscape will become a very powerful software and a perfect alternative to CorelDraw and Illustrator for Linux. I believe the software is perfectly functional as it is, it has complete set of tools and wonderful node editing capabilities (even easier than the aforementioned software), you guys really knew what you were doing there. The learning curve was almost non-existent. I've managed to create some nice logos effortless within minutes, but again since it lacks advanced printing capabilities at this time it cannot be more than a curiosity for me.
I truly believe you guys are doing an excellent job with Inkscape and I for sure will stay tuned for the next release.