That wiki article and the screencast it points to at the end are a great resource.
You can get/install the member controls from the package repository. All you need to do to install that package is:
1. Go to the developer section of the umbraco UI
2. Right-click on the Macro item in the treeview
3. Select the Import Package menu that appears
4. Browse the package repository for the Member Controls package (in the Collaboration section)
5. Click to install the package; follow the on-screen instructions.
From there, you're ready to follow the outline or screencast to get you started.
cheers,
doug.
MVP 2007-2009 -
Percipient Studios