You know how LightBox works for displaying the product's images by displaying a "pop over" screen?
Well, wouldn't it be extra cool if the same thing happened when writing a review?
Click Write Review
Browser screen dims and a Pop Over screen appears with the review fields, and buttons.
Clicking submit either closes the Pop Over immediately or if the reviews are to be approved by admin, the window displays that message and a close button is displayed.
OR
If nothing else, after the review is Submitted, it should not return to another empty review form (you don't want them entering two reviews for the same product.) Instead, it should display a thank you message or a "your review needs to be approved" message and a "Back To Product" button.