Shenzhen
From Justin Mitchell: There is another (the third, I think, in as many weekends) anti-Japanese protest in Shenzhen on Sunday from 10am-3pm. No mention of tomatos or eggs, but a friend and translator who is going to help me cover it said she was told not to bring any Japanese electronic items, such as a camera, because "it will be destroyed."
 
Shanghai
According to Interfax, Saturday's march will not start from Xujiahui, but from the Bund area, ending at the Japanese consulate. They have a map and more information here.

Xiamen
On the blog SERIALDEVIANT.ORG(Y), Andrea See has published an email doing the rounds in Xiamen about a march starting on Sunday at 9am at Bailuzhou Park. However, the would-be marchers appear to have some geography problems, which you can read about on Andrea's blog here.