Jamis, assume 18t rear sprocket. 700x32 tires. 48/34 crank.

26.9 34/18 1st
32.8 34/18 2nd
37.9 48/18 1st
38.1 34/18 3rd
43.4 34/18 4th
46.4 48/18 2nd
51.0 34/18 5th
53.9 48/18 3rd
61.3 48/18 4th
62.4 34/18 6th
72.0 48/18 5th
72.4 34/18 7th
82.4 34/18 8th
88.1 48/18 6th
102.2 48/18 7th
116.3 48/18 8th

Rather than a half step, there are a couple ratios on there, right in the meat of where I'm usually at, that are pretty close together. Currently, I'm running 44/18 on a nexus hub, which is just about perfect for my slightly hilly commute--if I lived in real hill country or mountains, I'd be looking for a lower gear. As it is, I'm thinking of a double chainring setup, but it would be more like 48/38 or some thing that would stagger the middle of the range a bit more evenly. Even so, I think I'd rarely be shifting the front, considering it more a hi/lo range, set it and forget it kinda thing, rather than something to be used for hitting half steps along the regular range.