A client of mine uses an estate agency software package called Reapit ([url removed, login to view])
Using the feed they upload using FTP - I need somebody to integrate the property results into an existing website. The file is sent from Reapit as a .blm and is in 'rightmove format'.
It is to work on a unix hosting server.
For your reference Reapit provides an API
An example of Reapit integration can be seen at [url removed, login to view] where you can see how the data is searched (for sale properties) plus the styling used for search results etc