Polanski finished editing his latest film while under house arrest. The trailer looks like a regular hollywood thriller formula
But I'm still going to look for it and try to catch it on the big screen. Dan once said that Polanski is a better director when dealing with chamber cinema stories (Knife in The Water, Repulsion, The Tenant..). Even at best I don't expect Ghost Writer to be better than his noire Chinatown.
These are Dan's reviews on some of his work:
http://www.cosmoetica.com/B588-DES509.htm
http://www.cosmoetica.com/B563-DES488.htm