On my blog I have created a series on study tips for the MCSE: Desktop Infrastructure certification , this is the new MCSE level certification that includes Remote Desktop Services.

Part 1 explains the overall requirements, exams you need, if you can upgrade from previous exams and general study tips:
http://www.rds-support.eu/danny/hitchhikers-guide-to-mcse-desktop-infrastructure-certification-part-1/

Part 2 Provides more information what to study on how to study for exam 70-415:
 http://www.rds-support.eu/danny/hitchhikers-guide-to-mcse-desktop-infrastructure-certification-part-2/

Part 3 Provides more information what to study on how to study for exam 70-416:
http://www.rds-support.eu/danny/hitchhikers-guide-to-mcse-desktop-infrastructure-certification-part-3/

Unfortunately for now this is the maximum Certification that you can achieve on Remote Desktop Services,  I hope that the Microsoft Certified Solutions Master (MCSM) track will add something like MCSM: Desktop Infrastructure or MCSM: Remote Desktop Services in the future.