I definitely like the Nancy Clark books on general nutrition and cycling nutrition.

I used weightwatchers, and then added in cycling, to lose about 38 pounds since Jan 2009. My points on WW probably come out to about 1000 calories per day, plus the extra points for the week (which I never use up).

When I started cycling regularly, 25-35 miles per week, 10-15 mile maximum on most rides, I didn't need to eat during my rides, but needed to add in extra snacks once or twice a day (+/-100 calories). When I started riding longer distances, I needed to eat on the rides and allow myself more food per day.

The between meal snacks really make a big difference for me.

Typical meals:
Breakfast 6:30 (about 200-250 calories) - oatmeal with dried fruit or fresh fruit or 1/2 bagel with light cream cheese and lox, or nonfat cottage cheese and fruit with a little cereal sprinkled on top and a cup of tea with honey and milk

Snack 10 am- about 100 calories, for example: ounce of pretzels, handful of almonds, a piece of fruit, or 1/2 Luna bar

Lunch 11:30 am - about 250-300 calories- main items such as soup or salad w/ chicken or other protein, a turkey sandwich on "sandwich thins" light bread, or leftovers, plus a piece of fruit and usually one other snack

Afternoon snack- 100 calories fruit, pretzels, nuts, nutri-grain type bar etc.

Dinner- often fish or chicken with pasta or rice, with salad or vegies or corn tortilla quesadillas- usually about 300 calories

Evening snack: Skinny cow ice cream for example (100 calories or a little more).

Adds up to about 1100-1200 total.

When I started riding longer distances (20-35 miles), I added in snacks during my ride, like dried fruit and nuts, a Luna bar, shot blocks etc, and a snack after the ride- sometimes an iced mocha would be enough, or a smoothie. If I ride over 40 miles, I really need to have more food on the ride and more snacks or larger meals when I get back or I am ravenous later and the next day.

It was easiest to lose weight when my rides were more moderate in length- 15-40 miles. When I ride longer, I have a harder time balancing the calorie deficit with the exercise. Or maybe I'm just so close to my goal weight it's just hard to lose any more now and I should stop worrying about it.