You can download and watch a few clips from the film from this site. Barrowman is in two roughly 20 second WMV files. Unfortunately the famous scene is not included. For that you will just have to go down to your local DVD store, find the bargain bin and perhaps splurge out as much as $5 for this cinema classic.
PS - For those in the UK. Charlotte Church will be on the Parkinson ITV chat show Saturday evening. It looks like she will just be promoting her new album without any Torchwood announcements.