Based upon what you've provided, no, there is no class action here.
You and your colleagues received a promise that your employer would "think about" providing severance. January 2011 is not over, and your employer could still be "thinking about it." Alternately, the employer may already have decided not to provide severance, but the employer has no legal obligation to notify you of a negative decision.
In the meantime, do not delay in filing for unemployment compensation. You and your colleagues may be facing an unfortunate situation.
And, a quick correction, Georgia is an "at will" employment state.