According to Delta's Travelnet help site, I'm assuming it was written for furloughed Delta employees but I would certainly hope it applies to us. It said the furloughed employee would get unlimited S3B on Delta, and Delta Connection flights and eligible pass riders would get unlimited S3B passes with the yield fare.

Delta Recovery Plan and Delta Workforce Program Furloughed Employees Pass

Pass Rider Eligibility Employee and these eligible pass riders of the employee while furloughed with recall rights: spouse/domestic partner or travel companion, dependents and full-time students, non-dependent children, and parents
Pass Privileges Employee - Unlimited S3B flight days (yield fare ticket not required)
Eligible Pass Riders - Unlimited S3B yield fare tickets.
Travel permitted on Delta, Delta Connection (ASA, Chautauqua, Comair, Freedom, Shuttle America and SkyWest).
NOTE: Flights operated by Chautauqua on behalf of US Air (with the US code) are not applicable. Flights operated by SkyWest on behalf of United Airlines (with the UA code) are not applicable.
S1 Emergency Travel Not applicable
Buddy Passes Eight authorizations each pass anniversary year if pass eligible on the anniversary date (furloughed with recall right).
Family Fares Not applicable
Reduced Rates Not applicable. Reduced rate tickets purchased must be used prior to your furlough date. Reduced rate tickets can be refunded following Delta’s corporate refund policy.
ZED Fares Not applicable

This was copied and pasted from a table so it didn't come out just right.