Asus have a direct competitor featuring trackpoint and three physical buttons. Only problem is I can't seem to find its pricing or availability anywhere.
In my experience with Dell and HP laptops, their versions of the trackpoint cannot match the smoothness of IBM/Lenovo's at all. Very noticeable difference that really ruins the experience for me. However, ASUS may have done better, not sure.
http://www.notebookcheck.net/Asus-ASUSPRO-Advanced-BU201LA-D...