What are some symptoms and signs of multiple sclerosis that a sufferer might experience?

Many possible. Changes in vision out of one eye, double vision, whole segments of the body with sensory changes not mapping to a single nerve root, weakness in a limb, imbalance, fatigue or symptoms worsened by heat/exertion, new bowel or bladder dysfunction. Symptoms must last a minimum of 24 hours, more typically escalating over several days, peaking, then improving. Neuro exam should be consistent.
Classical onset. Unilateral loss of vision, loss of balance and coordination, electrical shocks down back on flexion of neck, weakness and stiffness in legs, but also, more subtle, including focal weakness, fatigue, cognitive deterioration, double vision, dizziness, etc. Important, these presentations may be associated with other illnesses, and, in themselves are not diagnostic.
MS. Symptoms vary, because the location and severity of each attack can be different. Episodes can last for days, weeks, or months. These episodes alternate with periods of reduced or no symptoms (remissions). Fever, hot baths, sun exposure, and stress can trigger or worsen attacks. http://www.ncbi.nlm.nih.gov/pubmedhealth/pmh0001747/.