Masterharper: You're going to live in Branner eh? Well first thing I'd tell you is that during NSO you're probably going to hear your fair share of: Branner Sucks chants. Pretty much everyone who doesn't live in Branner sings it lol. Don't worry that's only the first week

Branner is definitely one of the nicest (if not the nicest) freshmen dorms. I believe that most people get two room triples (at least that's what my friend had his freshman year) and the building is new and good looking. The food at Branner is (according to my friends) so so bordering bad but that's not really a problem because there are 3 other dining halls really close by (Wilbur, Stern and Manzanita). It also has a rep for being one of the party dorms.
Hmm well all the dorms have wireless now and some of them let you connect to the network without an ethernet cable (others don't) but really you can always borrow one for an hour if you need to. If you have one lying around it might come in handy. The internet is faster when you're wired over wireless but I've never heard of anyone complain about the wireless being too slow.
Yes all students need to take one science and one math class (as well as other requirements). Most of my fuzzy friends ended up taking sleep and dreams to fulfill their science req. and many take Stats 60 to fulfill the math req. That said introsems are also a great way to get rid of pesky GERs (general education req.). Do you need a calculator? Depends on the classes you're taking really. Most people I know still use notebooks (including me) but a significant percentage use laptops. I (and others I know) tend to not use laptops because I end up surfing the web instead of taking notes.
alessandro: Yes I think those five are too much you're first quarter here. Physics 45 isn't the easiest class in the physics 40 series (that would be 41)but its not the hardest (43) either. It'll probably require some time commitment. My friends who took it (I dont need it as a ChemE) told me it wasnt bad. Math 42 however is. I have yet to hear a single person say anything good about this class. I've heard its hard and time consuming. So be prepared. IHUM is usually not bad so don;t worry about that. I think that you should at most (you already have 13 units lined up) take one more class other than these 3 but don;t take 2. You'll have a chance to discuss your schedule with your advisor (honestly not really that helpful) and your PM (peer mentor-could be helpful) and dont forget asking other students!
masterharper you can't pick classes until after you meet with your advisor NSO week don't worry.