benefit period is usually annual depending on when coverage started for you. So if your coverage started 1/1/2012, it is for Calendar 2012. The benefit period is always 12 months, then annual deductibles reset.
for 1-60, yes you are responsible for the deductible only, your coinsurance is 0%, after that, you pay $289 per day.
From CMS:
Each beneficiary has a lifetime reserve of 60 days of inpatient hospital services to draw upon after having used 90 days of inpatient hospital services in a benefit period. Payment will be made for such additional days of hospital care after the 90 days of benefits have been exhausted unless the individual elects not to have such payment made (and thus saves the reserve days for a later time).
A coinsurance amount equal to one-half of the inpatient hospital deductible applies to lifetime reserve days.