The following links will take you to other projects that are dealing with similar issues. Some of these are using the product of DTNRG directly, and others are developing their own approaches:
Most of them are old and outdated. no much progress since YRS!

• Technology and Infrastructure for Emerging Regions (TIER)
• Time Equals Knowledge (TeK)
• FirstMileSolutions
• Interplanetary Internet
• SeNDT - Sensor Network with Delay Tolerance
• Saratoga and HTTP-DTN
• SNC Project
• N4C Project
• ZebraNet
• FidoNet
• Postmanet: Turning the Postal System into a Generic Digital Communication Mechanism (Princeton)
• The Wizzy Digital Courier in South Africa
• The Message Ferrying Project at Georgia Tech
• Node Localization using Mobile Robots in Delay-Tolerant Sensor Networks at NICTA, Australia
• UCLA DTN for Sensor Networks
• SUMOWIN
• Shared Wireless Infostation Model (SWIM) at Cornell
• The Mindstream Project at the University of Waterloo School of Computer Science
• World Wide Web Offline Explorer (WWWOFFLE)