The architecture developed by NextGRID (http://www.nextgrid.org/) relies on DMI for data transfer.  It fulfils an 
important role in our architecture by providing a structure and interface for data transfer services.  An important 
feature is that it separates the transfer resources from individual data transfer protocols, such as GridFTP, etc.

It also provides the flexibility to support ‘third-party’ transfers, which are important for efficient implementations
 in Grid systems.

Overall it is good stuff.