I recommend trying the Explode button:

Press the structure button Structure button to browse down through the model’s assembly structure or component hierarchy. You can use this to isolate specific components in your model, hiding everything else.
After hitting reset Reset button, now try the explode button Explode button and then manipulate the slider that appears at the top of the window to move the various model components outwards from the centre to form an exploded view.
Aside from the need to support a huge array of formats, the viewer is really good at streaming large models – displaying them at appropriate levels of detail – and allowing you to get in and work with the structure of these models.

via full post:
A sneak peek at the new Autodesk 360 viewer – Through the Interface

To me, this type of simple viewing solution may present a good alternative to 3D PDF for sharing basic visualization models to the Client and other non-design-team stakeholders.  The key issue will be ensuring the web browser of the target user supports WebGL.  I think it should also provide a constrained orbit mode.

Example Revit Export to view in WebGL

The export includes:
– Visible categories of the active 3D-View
– Solids and geometric instances inside the section box
 
The export itself creates a wpm file (WebGL-Publisher Model) and a html file which displays the exported model.
In addition to that all needed textures and JavaScript libraries are copied to the target directory.

Download trial:
http://apps.exchange.autodesk.com/RVT/en/Detail/Index?id=appstore.exchange.autodesk.com%3awebgl-publisherrevitexport%3aen

Other downloads at:
http://www.webgl-publisher.com/DownloadEn.html

Press release:
http://www10.aeccafe.com/nbc/articles/view_article.php?section=CorpNews&articleid=1208083&interstitial_displayed=Yes

Heads-up:

www.autodesk.de has an extended post on how to view Revit files for free at this link:
Autodesk – Autodesk Revit Viewer Free

The page reviews the following methods (none of which are very exciting):

For Revit files There are various possibilities.

Display native Revit files
  • Revit installation in viewing mode
Viewing exported data
  • Viewing DWF in Autodesk Design Review
  • DWF viewing in Internet Explorer
  • DWF Viewing into NavisWorks
  • Viewing in NWD NavisWorks Freedom

The English equivalent to the .de page is considerably shorter:
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=7290003&linkID=9243099