One of my favourite sites is the site of the National Palace Museum in Taiwan. Beautiful pictures and a lot of information. Check for instance the section with past exhibitions. My favourite one is A Special Exhibition of Bronze Inscriptions from the Western Chou. The introduction is a good entry into the world of bronze inscriptions. Other ones are Ancient Writing from the Ruins of Yin (about oracle bones) or a Special Exhibition of Shang Period Ritual Bronzes.
I can spend hours on sites like this.