Did you miss the recent update to Whitefeet Tools? These are probably the oldest and most robust database editing tools for Revit.
The highly experienced developer, Mario Guttman, is also actively working on Project Hummingbird (a set of Grasshopper components that facilitate the creation of Revit native geometry). Check it out at:
http://ghhummingbird.wordpress.com/
and download at
http://www.food4rhino.com/project/hummingbird
The latest version of Whitefeet can be downloaded by following the instructions at:
http://www.whitefeet.com/Tools/
via
Just posted some minor fixes to http://t.co/UDjAdbfZ1b which also affect http://t.co/39kq1PUZGX #RevitWhiteFeetTools #RhinoHummingbird
— Mario Guttman (@MarioGuttman) December 22, 2013

6:12 Vasari Talk 18: Grasshopper to Vasari- Introductions
5:23 Vasari Talk 18: Grasshopper to Vasari – Jon Mirtschin on Geometry Gym
9:41 Vasari Talk 18: Grasshopper to Vasari – Hiroshi Jacobs on Chameleon
10:23 Vasari Talk 18: Grasshopper to Vasari — Tim Meador on Hummingbird.mp4
12:00 Vasari Talk 18:Grasshopper to Vasari — Nathan Miller on OpenNURBS
18:25 Vasari Talk 18: Grasshopper to Vasari — Discussion.mp4