Miles' phone number (which we see when Hill reads the text message on Roe's mobile phone in the restaurant) is shown as 917-867-5309 - a nod to Tommy Heath's classic rock hit "867-5309/Jenny," which repeats that number (sans area code) in the refrain.
The trivia items below may give away important plot points.
Several alternate endings were written, one being where Miles ended up blackmailing Rowena. The final shot was to be a close up on his computer showing several files named Rowena, the last shot Rowena's face camera zooming into her eye. The writers later changed their minds at the last minute.
When Rowena finds Miles "secret" room a shot of Miles computer flashes briefly on the screen, showing a picture of Rowena's head pasted over a body in a bathing suite. The body pasted over is in fact Halle Berry herself from her infamous nude scene in the movie Swordfish (2001). The bathing suit only appeared on the cut for TV version of the film.
Halle Berry and Clea Lewis also starred together in the The Rich Man's Wife (1996), a motion picture that also featured a twist in which Halle Berry's character ended up being the actual murderer in the theatrical version.