A friend sent me this video for a web-security product "explained with children's toys". Look at who plays the parts of "the Hacker", "the web-spiders", and "sys-admin Donna"
Yeah, there are several Doctor Who references in there. What I like about it is that only fans will catch them, there's nothing too over the top.. well at least speaking to those in the US, the UK viewers mileage may vary.
The Gallifreyan Embassy - Forum