Most of the darkening takes place during the 1st 6 months. The most important thing is to not place area rugs on the floors during this time. I believe you should be fine with the furniture on there. Generally, you wait 4 days after last coat before putting furniture on floors and 30 days for area rugs (on oak, etc). I recommend to my customers that for American cherry, American walnut as well as exotics (e.g. Brazilian Cherry, Santos Mahogany) to wait 6 months for area rugs.
Debbie Gartner aka The Flooring Girl
Owner of Floor Coverings International
Westchester County, NY
914-937-2950
http://TheFlooringGirl.com