For simple trips people are choosing not to pay the overhead for their personal travel now that you can shop around easily yourself. The agent is still pretty good for package holidays, though.
Companies like American Express offer corporate travel services. My last job had this service: one could call or email them from the back of the cab between meetings and they'd call back in 30 minutes with a whole itinerary, with flights, car and hotel. Needless to say, this is very expensive, but probably cheaper than having dedicated personnel at your company.
So the optimize-for-cheap and optimize-for-easy markets are probably covered. Perhaps there is a gap in between, but you'll be competing with some established companies from either side.
Neither of the answers is quite right, though. Ignoring the rest of the mass in the solar system, the answer is that they both orbit the center of their combined masses. This happens to be located somewhere inside the sun's volume, but definitely not at it's center. So neither goes around the other.
That the earth goes around the sun is a pretty good approximation of the actual phenomenon, sure, but the approximation, in it's wrongness, loses the power of the real answer to actually explain what's happening.
Pedantry perhaps, but If we want people to have a better model, let's make it the right one.
http://en.wikipedia.org/wiki/Thomas_Cook
For simple trips people are choosing not to pay the overhead for their personal travel now that you can shop around easily yourself. The agent is still pretty good for package holidays, though.
Companies like American Express offer corporate travel services. My last job had this service: one could call or email them from the back of the cab between meetings and they'd call back in 30 minutes with a whole itinerary, with flights, car and hotel. Needless to say, this is very expensive, but probably cheaper than having dedicated personnel at your company.
So the optimize-for-cheap and optimize-for-easy markets are probably covered. Perhaps there is a gap in between, but you'll be competing with some established companies from either side.