Login to the NZMac.com website and go to to the NZMac.com Community section. From there, you should have access to an "Applications" menu, which you should select "Browse" from...

Find the application listed called "My iTunes" and click on the "+" symbol to add it to your profile...

You'll see the following message. Click on "Settings"...

Now you need to start up iTunes. Launch the application, login via the button at the top right of iTunes and click on "Account"...

On the account page, click on "Enable My iTunes"...

You have to accept a warning here to proceed...

On the screen that appears, decide which of the feeds you want to activate, make sure they are ticked and click on "Done"..

Go back to the page where the feeds are listed and click on the "Get HTML Code" button for the feed that you'll want to display from your My iTunes information on NZMac.com...

When your web browser loads, there are two bits of information that you'll need to use in order to have your information displayed in the Community section. The first is your user ID, which you can see highlighted in the image below..

You also need to find the code related to the New Zealand iTunes store (or other stores if you buy from somewhere other than iTunes NZ). This code comes just after the coding "&sf=" and you can see an example highlighted here...

Go back to your Community Profile on NZMac.com and enter the information you've obtained from iTunes, as you see in this example. Make sure you select the correct feed type and then click "Save"...

Don't forget that you can also rearrange the order of the applications that are displayed under your profile by dragging the application up or down, as you see here...

You also have control over privacy settings for each application you use in your profile, in terms of who gets to see the information displayed...