Check out this episode of old BBC show Japanorama - full of Ultraman facts. I remember enjoying this series - back when Jonathan Ross was a BBC employee! This was one of the best things he did, sharing his passion for Japanese culture.
Here's another good documentary by NHK, this one covers the topic of special effects (Tokatsu) shows. It starts off with Godzilla, skip to 20 minutes in for Ultraman:
How about some Ultraman bento? Ready to carve eyes out of a hard bolied egg yolk? I hope so:
A Great Top 30 of Ultraman Monsters:
Noh Masks and Ultraman:
Tokatsu exhibition Facebook page, some great pics of the miniature sets: