The 40GB PS3 is almost silent *makes some audible noise when folding* It's curved shape certainly doesn't lend to stacking on top of it. I have mine vertical.
Battlestar Galactica apparently looks like total ass on HD DVD (perhaps a poor compression job). Artifacts galore. Heroes and Serenity would be nice on blu-ray, I'm sure they will come with time.
Personally the family has been enjoying the Pirates of the Caribbean trilogy, Cars, Ratatouille, Meet the Robinsons, Simpsons movie, Open Season, Die Hard 4, Blackhawk Down, Tears of the Sun, Hitchhikers Guide to the Galaxy, Casino Royale, Fifth Element, Bridge to Terabithia, Harry Potter 1-5 (also available on hd dvd).
Via NetFlix rental we've watched Fantastic Four: Rise of the Silver Surfer, Shooter, War, Superbad, Resident Evil: Extinction, The Pursuit of Happyness.
If you want TV shows then you can get Prison Break Season 1 and Lost Season 3 on bluray. Along with Weeds season 1 and 2 and the Tudors (Euro import right now), Smallville Season 6, Sopranos Season 6 (also on hd dvd but HBO will be switching to blu-ray only along with New Line and Warner).
Has anyone been watching the Terminator Sarah Conner chronicles on Fox? It's got the chick from Serenity as a major character.