Your management software should be the primary source of all rental information including up to the minute rates, rules and availability as well as the latest property images and marketing copy. That data is then pushed to all channels, thus all sites (including your website) are kept up-to-date and synced with the correct rates, availability, marketing copy and images.
Lodgix connects to several channel partners including...
VRBO (all sites in their network)
Marriott Homes & Villas
Urbain Hospitality Group
Lodgix also publishes an extremely comprehensive and versatile Wordpress plugin which makes creating a website that is sync'd with Lodgix super easy. More information can be found here.
Additionally we also publish iCal export URLs for all properties and allow iCal importing from any third party sites that publishes iCal. Configuration instructions can be found here.