Travel comparison engine

Hi all,

I am in the process of developing a site which will (hopefully) include an airfare comparison engine, with a bit of a twist.

I am interested in speaking with a programmer that has had experience in doing this before. Specifically, what I am interested in is the data feeds (is there a company that actually complies these already?). I know about the Ita software which shows flight availability, etc, but does this actually include pricing and deep link data for the likes of Expedia, and Travelocity, etc?

If someone has had experience with this<snip/>.

Thanks vm for any help you could provide.