I'm sure a thread like this has been done somewhere, at some time, but my system is down at work and I'd rather recycle a fun ongoing thread than have to read and respond to AnthonyDee and THX's posts for another day.
Without further ado, here are some recent HiFi spottings I've seen in movies / TV. . .
American Psycho - KEF (104.2 or something) with I think HK separates
Friends - Martin Logan Stats early, then MiniPod Blue later
What Women Want - BluePicker's Revel Gems
Italian Job - I remember the guy talking about a dream hifi system, can't remember what it was he got
Then, here's a whole list of McIntosh spottings (did some research and found they were listed online already):
9 1/2 Weeks - MC2155 closeup of one meter and countdown numbers.
As Good As It Gets (1997) starring Jack Nicholson and Helen Hunt
What Lies Beneath (2000) Harrison Ford and Michelle Pfeiffer
High Fidelity (2000) John Cusack and Stephen Frears
The Grateful Dead movie
Pillow Talk (1960) Doris Day and Rock Hudson. C-8 preamp. Can only be seen in the wide screen version.
Stepford Wives (remake) Nicole Kidman. MC2000 can be seen.
The Departed (2006) Jack Nicholson, Matt Damon and Leonard DeCaprio
Executive Action (1973) Burt Lancaster and Robert Ryan. MX110