Some great news.  The at 20 bakeries in Shanghai, cakes are free of Melamine and heavy metals.  On the downside, coliforms were founds in cakes at some locations.  This is not unusual for bakeries in China or the rest of the world.  Coliforms can indicate fecal contamination, but could be tied to any sourcing, eggs, creams, or simply the on site storage.
http://www.shanghaidaily.com/sp/article/2009/200901/20090120/article_388662.htm Excess bacteria in cakes by –
CREAM cakes sold at Christine, Marco Polo and Pucci Bakery failed a food test because they contain high levels of bacteria, the local market watchdog announced yesterday.
 
In November, inspectors bought a cake…

The other good news is the Shanghai Consumer Commission (formerly Consumer Association) is stepping up tests.

The other minor story in this cake-bacteria string is that food baskets and shopping carts are loaded up with other harmful bacteria…our over-populated shopping experiences at their best! I especially found the whole frozen chickens being stuffed into baskets esp appetizing.  It was picked up on the IHT/AP.

http://www.shanghai.gov.cn/shanghai/node2314/node3124/node3141/node3151/userobject6ai1145.html