If you haven’t gone to see Grindhouse yet, now might be the best time.  The three hour and twelve minute long double feature, directed cooperatively by Quentin Tarantino and Robert Rodriguez, finished a distant fourth last weekend at $11.6 million.  The reason?  Despite an abundance of positive reviews, many analysts say the film is just too long to attract a mass audience; Harvey Weinstein, head of Weinstein Co. and one of the film’s executive producers, concurs.  And, said Weinstein, if the film fails to improve in profits over the coming weekend, the double feature could be split and shown separately for the remainder of its theatrical release.  The decision to divide the two 70s-themed gorefests has already been made for their international and DVD releases; now, in a rather sad turn of events, the gimmick on which this unique homage hinges may be torn asunder before our very eyes.  So, for all of you still sitting at home polishing off the last of the Cadbury Creme Eggs, this may be the only week to see Grindhouse exactly as the filmmakers intended.  On the other hand, those of you steering clear of this lengthy film may find things a bit more palatable in a week or so.