an app will be released within weeks to allow the user to view this on their phone; at the moment, movie rentals are only viewable on the Xoom & desktop via Market using Chrome explorer. you'll be either directed to Youtube (using GoogleShopper account credentials) or stay in-market to view your purchase.----(paraphrasing every story written about this so far.)
however, you can access YouTube.com/movies on your phone browser & see, probably, the same titles since Google owns both...not sure if you can actually rent the movies from YouTube in your phone browser yet.
buy the way, OP, awesome name. just saw that movie about a year ago--only on a recommendation b/c of the invisible-friend's role in the movie, 9-5.