Aw! Rag beat me to answering the questions! 
What are the physical requirements? (i.e. certain weight to lift, physical endurance test, etc)
I don't know of any EMT program that has such a requirement in San Fransisco Bay Area, however, most ambulance companies do. It seems to vary from company to company, but I'd say you are expected to lift >120-125lbs. If you plan on becoming a tech in a hospital, you may be expected to be on your feet longer than eight hours.
What skills (beyond my CPR/AED for the Professional Rescuer training) will I be expected to master in EMT-B?
Critical thinking would be a good one.
The skills you'll hopefully be taught are: vital signs, patient assessment, immobilization, airway management, bleeding control, splinting, and CPR. You'll be expected to perform these skills up to the standards of the
NREMT in the Bay Area.
What type of math skills (Algebra, Geometry, etc) will I need?
Basic arithmetic: addition, subtraction, multiplication, and division. You don't even need to know what a triangle is to be an EMT, but this shouldn't discourage you from being proficient in math.
What kind of study advice would you give me?
I'd recommend not to study more than two hour straight, and I personally believe even more than an hour is pushing it. I'd allocate about 30-60 minutes a night dedicated to just studying, and no more than that. Do not wait until the last minute to study the material. Try to be a couple of chapters ahead of the class so you don't end up playing catch-up, and when lecture comes, you'll have prepared questions. I believe it's better to ask questions when the teacher asks if there are any questions or in between lectures (break). If you take notes, do not write everything your teacher says and everything from the powerpoint; everything should be in the book. It's important to understand what's going on, or what you are doing; Do not get caught up in saying things word-to-word verbatim.
Specifically for patient assessments, you do not need a body to practice. Just remember that when it comes time to touch a body, don't be afraid to touch. From what I've observed, the hard part for most EMT student is verbalizing everything. I'd get used to verbalizing sizing up the scene and the initial assessment (together called the primary assessment) before practicing/learning the rest of the assessment. The primary assessment contains the most critical failures i.e. automatic fail if you forget to say it. Just to reiterate what I said, you don't need a body to do this, just say it outloud to yourself.
Any other advice you would like to pass down to a newb?
Learn some basic medical terminology and familiarize yourself with anatomy and physiology. I believe those will immediately help you in EMT. In the long run, knowing chemistry, biology, and a lot of other subjects will benefit you too. Unfortunately, for an EMT program, it may be overkill, but for your future patients, it's not.
Please use the search feature on the forums to check out many other studying advices and advices in general.
