Prints from 6 mega pixel Nikon D70

Did some prints from the D70 recently, and with the size of the picture saved from the D70 at full resolution, you're just about able to do a 8x12" picture at exactly 250dpi. At least that's the requirement from my neighbourhood photo developer . The output is not too bad, but I have a shot that looked a little soft but that's probably because of the kit lens on the D70 at 18mm. The second shot was crisp and taken with the Nikkor 80-200mm f2.8. One day I'll try and blow it up or do crops, and see if a picture developped with less than 250dpi will have quality compromises.