Latino-Review reports that interiors of the Millennium Falcon have been completed at Pinewood Studios in London, where an estimated 90 percent of the film's production will take place. (The other 10 percent is expected to shoot in Los Angeles.)
True, it seems a bit early for production interiors to already be completed in September 2013 when Episode VII isn't expected to begin filming until sometime next year. However, this isn't the first time we've heard the rumor. A site called Talkbacker reported a similar story earlier this week.
This is by no means proof that the Millennium Falcon is in Episode VII, but with LR now backing the rumor as well, it certainly seems more likely than it did a few days ago.