You may have received an email like I did the other day from JELD-WEN Windows and Doors? If so then..."as you were", if not they announced the availability of content in a variety of formats, including Revit. If you use their products in your projects now you can use their families in the project too! This is an excerpt from the email they sent:
Using JELD-WEN's Web site, architects are able to configure windows and patio doors to fit openings, then download corresponding graphics in Revit, DXF, DWG and PDF formats. The templates cover JELD-WEN's complete Custom Wood Window line, with Siteline EX and Tradition Plus wood window product lines scheduled for later this year. The 3D window templates are available as a link from the Custom Wood window product pages on www.JELD-WEN.com, or at www.parametrx.com/912/templates/index.asp.
If you check them out be sure to let them know how you like them.
Let's hope others follow their example...well except for their competitiors 8-)