Lots of Hitchcock boards other than Psycho
Now have Archived IMDb comments (not full archives but 30-40 threads worth up to about 10 messages deep, so enough to feel somewhat homey): NbNW, Frenzy, Rear Window, I Confess.... A few others that checked out: both Manchurian Candidates, Casablanca, Split, Mad Men, The Matrix, American Honey. Let's hope Psycho fills in soon.
Archiving a Board, it's not as expensive as you'd think. It's cheap really. You know--needles and thread, sawdust. The chemicals are the only thing that cost anything.