In CRM2011 we have relationship explorer as shown in screen shot.
We can drag any available relationship from the relationship explorer to the form navigation. When we click on this navigation link, the system will display the associated view for that relationship.
The problem is that some relationships does not exist in the relationship explorer. For e.g some system relationship relationship between user and leads.
We can use the following URL to display any associated view.
Replace the highlighted values with the values from your deployment Values
Here is the example of the with all the values. This URL will display the associated view of the leads owned by the user specified in oId.
http://servername/orgname/userdefined/areas.aspx?oId=%7b734F5966-827C-E111-A07F-00155DDBE211%7d&oType=8&pagemode=iframe&security=852023&tabSet=lead_owning_user
I hope this helps.