Personally, I think one should eat almost immediately after getting up. But that doesn't mean you have to have a full on breakfast.
For example (and I AM hungry in the mornings) I get up around 5am and I leave the house at 6:30. I have at the very least a cappuccino with one full serving of skim milk OR I make a smoothie with buttermilk and a frozen banana. This way I'm not eating too much too early. My train is at 7am, I eat an apple as we pull out of the station. About 40 minutes later I eat a sandwich (with whole wheat bread, maybe some alfalfa and cucumbers, some chicken lunchmeat). At this point I've covered all my bases and I'm not starving when I arrive at work (which is good, there are too many temptations where I work!!).
I know that it's also very important to eat WHEN you feel hungry and stop WHEN you feel full, but unless you have a pretty decent intuition/feeling about this AND you are fully prepared WHEN you get hungry in the morning, I would personally break your fast right away.
No one says it HAS to be a full meal. You can always split it up
