Thanks to everyone!!
To tell the truth I studied about one week for part I. Mainly cause I knew most of the stuff. Personally, I'd recommend people to focus their study on declarative transactions and
patterns definitions. The rest of the exam IMHO is something you aquire with experience.
Part II: My class diagram is real simple (only 12 classes) and concetrated on the domain model objects and their interaction. Component diagram showed immplementation guidelines (Web tier, EIS tier) and sequence diagrams were really simple. Didn't focus much on details about leg, flight, etc... Simply documented their relationships using UML.
Part III: My opinion is that an Architect has real value when he is able to express himself well. Since this are essay type questions
you should be concerned on being as clear as possible and avoid being too technical. Be shure to understand architectural system capabilities (escalabiliy, security, testability, etc...)
Hope it helps