On March 5th, California's Supreme Court will hear oral arguments on Prop 8. The fight is not over yet. From Equality California:

On January 15, 2009, 43 friend-of-the-court briefs urging the Court to invalidate Prop 8 were filed, arguing that Proposition 8 drastically alters the equal protection guarantee in California’s Constitution and that the rights of a minority cannot be eliminated by a simple majority vote.

Be sure to take a minute to sign Equality California's online petition to support overturning Prop 8. Also, if you live in California, you can attend one or two rallies being held by the organization.