Miles' phone number (seen when Hill reads the text message on Ro'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 the phone number (sans area code) in the refrain.
The trivia items below may give away important plot points.
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 suit. 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 in the edited-for-television version of the film.
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 would have been Rowena's face camera zooming into her eye. The writers changed their minds at the last minute.