Now with the release of Pro 10, the app seems to finally be a sort of plugin to Lightroom.
Interaction with Lightroom: DxO image quality for all of your photos
Benefit from the power, the processing quality, and the automaticity of DxO OpticsPro, thanks to its complete and non-destructive integration with Lightroom. Transfer your RAW images from Lightroom in one click and process them in DxO OpticsPro. Then using the Export to Lightroom feature, send them directly back into the application: the modified images are automatically stacked with the original images, thus facilitating their classification. Keep the flexibility of a RAW file for further processing: you can now generate images in DNG format as well as JPEG and TIFF. Preserve your images rankings (as stars or keywords): DxO OpticsPro saves your image metadata.
http://www.dxo.com/intl/photography/photo-software/dxo-opticspro/features
Interaction with Lightroom: DxO image quality for all of your photos
Benefit from the power, the processing quality, and the automaticity of DxO OpticsPro, thanks to its complete and non-destructive integration with Lightroom. Transfer your RAW images from Lightroom in one click and process them in DxO OpticsPro. Then using the Export to Lightroom feature, send them directly back into the application: the modified images are automatically stacked with the original images, thus facilitating their classification. Keep the flexibility of a RAW file for further processing: you can now generate images in DNG format as well as JPEG and TIFF. Preserve your images rankings (as stars or keywords): DxO OpticsPro saves your image metadata.
http://www.dxo.com/intl/photography/photo-software/dxo-opticspro/features