Interactive Application Architecture Patterns: MVC, MVP & PAC

Found a great article on the comparisons between Model-View-Controller (MVC), Model-View-Presenter (MVP), and Presentation-Abstraction-Control (PAC):

Interactive Application Architecture Patterns by Derek Greer

Particularly useful (for me) is the descriptions of the pattern variations used by the Microsoft Patterns & Practices software factories (i.e.: Smart Client Software Factory and Web Client Software Factory).