Excerpt:
.... after Obama signs the repeal into law, he -- along with the Chairman of the Joint Chiefs of Staff and the Defense Secretary -- must issue a certification stating the Pentagon is prepared to implement the repeal in a manner that won't hurt readiness, effectiveness, cohesion or recruiting. DADT will still be law until 60 days after certification. Until then, therefore, servicemembers are still at risk of being discharged or investigated.
SNIP
Defense Secretary Robert Gates has said he will sign on to certification "only after careful consultation with the military service chiefs and our combatant commanders and when I am satisfied that those conditions have been met for all the Services, commands and units." Although several of the service chiefs advocated against repeal during their testimony before the Senate Armed Services Committee, they all said they were confident they could implement the change and make it work.
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Certification and the 60-day Congressional requirement must be wrapped up no later than the first quarter of 2011," Sarvis told ABC News. "The bottom line: for now, gay, lesbian, and bisexual service members must remain cautiously closeted."
During this two-month period, Congress may hold hearings to review the Pentagon's policies and plans for implementation, which would likely re-air many concerns of opponents who were against repealing DADT in the first place.
http://www.huffingtonpost.com/2010/12/19/lgbt-groups-warn-servicemembers-reenlist-_n_798848.htmlBtw, there are been NO discharges under DADT since at least October 21st:
http://edition.cnn.com/2010/US/11/30/dadt.discharges/index.html?eref=edition_us