Shane Hathaway was so kind answering my question about just that, yesterday.
2001-07-24T10:11:33 PROBLEM(100) Init Ambiguous name for method of Products.Pyth onMethod.PythonMethod.PythonMethod: "manage" != "manage_main"
The PythonMethod product, like many other products, tries to make the management screens available to users depending on their permissions. Unfortunately there was a problem with the way the management screens were being set up and consequently in some cases only managers can access the screens. It's a case of overzealous security. There's a way to fix it but unless you're going to let non-managers create Python Methods, it's nothing to worry about.
The rest of the messages were normal log messages. You may want to read up on the options you can pass to z2.py so that the log messages are sent to a file instead of the console. (Of course, in development mode it's better that they go to the console.)
Shane
/Eivind