While reading the How Exchange Works blog, I noticed this nifty tool: Exchange 2010 RBAC Manager (aka RBAC Editor GUI).
RBAC Manager puts all efforts to simplify the RBAC administration. Basically it provides the missing GUI to edit RBAC settings on Exchange 2010 systems; including adding/removing cmdlets, cmdlet properties, assignments etc. RBAC tool is written in C# and using Powershell behind the scenes
Pre-Requirement:
1. You need to have Exchange 2010 Management Tools installed prior to running RBAC GUI.