You might get more responses on th MTB forum. I know that it is not suspension corrected and will only fit 2.1" tires, and has mounts for disc and canit's. So, if you're looking for a fork for an old MTB, and don't plan on running tires larger than a 2.1, I doubt you can go wrong when they go on clearance. I have seen them as low as $89.99. I've been considering one for my Al SS MTB, but haven't managed to make myself scrape together the funds.
As for the Nashbar carbon cross fork, is it the only reasonably priced option for a carbon, 1" fork with disc tabs? Any experience with them. It will be used for some commuting and mostly light trails. No racing.