A couple more examples, I needed to seperate my register and profile links:

Stand-alone User Profile link that only shows up when logged in
<a href='<%=DotNetNuke.Common.Globals.NavigateUrl("Register")%>'>
<%=IIf(Request.IsAuthenticated,UserController.GetCurrentUserInfo().FirstName + "&nbsp;" + UserController.GetCurrentUserInfo().LastName ,"")%></a>

Stand-alone Register link - only visible when logged out.
<% If NOT (Request.IsAuthenticated) Then %>
      <a class="custom_login" href='<%= DotNetNuke.Common.Globals.NavigateUrl("Register")%>'>Register</a>
<% End If %>

Also, John while we're talking about your blog, i accidentally screwed myself over yesterday with the login form. Switching the LoginTabId setting back from the database doesnt seem to fix it with 4.3.4. I found another way of getting around it if you can access your database though. Register as a new user (since on default settings it automatically logs you in) then change the users role to have administration privileges and fix it.