The Etransmit tool in AutoCAD is used by our teams when packing or sending information to the owner or client. Revit does not have a standard tool for etransmit however there is an add-on created by the Autodesk Lab. 

Product Link for Download
http://labs.autodesk.com/utilities/revit_etransmit/ 

With eTransmit for Revit, you can:

§  Copy and detach a Revit model and associated files to a single folder for internet transmission. This removes the typical error messages when you copy central files using the operating system.

§  Locate dependent files automatically and include them in the transmittal folder, helping to reduce the possibility of error. All dependent files are automatically converted to use relative paths so the dependent files can be located by the model.

§  Choose to include related dependent files such as linked Revit models, CAD files, DWF™ markups, decal images, and external keynote files. You can transmit any Revit (.rvt) model that has been upgraded to be compatible with a 2012 Revit software product.

§  Transmit models that are using file-based worksharing or server-based worksharing. eTransmit for Revit will also work with non-workshared Revit models.

I recently came across a unique feature in Revit.  It is called the I-drop drag and drop feature.  The feature works by clicking the thumbnail image of the file and dragging it onto the Revit plan, elevation, section, etc.  Release the file into the appropriate view.  See the image below showing the highlighted file on the right that was dragged into the Revit file on the left.  Revit does not link the file; it recognizes it as an object inserted into the current view only.  After placing the object, the user can explode it if they choose to do so.  Just a reminder that if the baseplan.dwg  layout changes, the modifications will not be automatically updated.  The user would have to perform the I-drop command again or decide to link the import.