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/

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I previously posted about Three Ways to go from Grasshopper to Revit.  However, Vasari Talk 18 (uploaded by AutodeskBuilding) shows that there are at least 4.

Learn more by viewing the playlist embedded below:

Or you can choose individual parts to watch here:
Vasari Talk 18 video playlist

What are the 4 ways?

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Session 18: Grasshopper to Vasari Panel Discussion – WikiHelp

It seems that more and more people are trying to move intelligent data from Grasshopper to Revit.  There are at least 3 different ways to do this:

Have you tried all three?  Which worked best for you?

You may also be interested in:
Rhino to Revit with Hummingbird | WhiteFeetTools

A recent and very informative post from LMNts describes their experience in moving data from Grasshopper to Revit.  Here is just one paragraph:
Chameleon appeared a few months ago and has proven to be an effective tool for adaptive components. The interface is intuitive on both the GH and Revit sides and we are yet to find any serious bugs with it. Another recent plugin is named Hummingbird (keep track of all these animals), a similar program which accesses the WhiteFeet Modeler to import adaptive components as well as Revit primitives (this has a lot of potential and will be discussed more in a future post). Take your pick, these are both great plugins.

Read more:
Adaptive Components, GH to Revit | LMNts

Note – the awesome glass Revit logo is from here – you can download it and use it as a desktop.  The grasshopper is from here.