Her role is that of Queen Mother, a powerful advocate for us as found in the story of the wedding feast at Cana. While we supplicate her, we are also reminded of the words she told the wine stewards: "Do everything He tells you." (UPDATE: Julie D. gets a fedora doff for this article explaining the Queenship of Mary.)
Where she has gone, we hope to follow.
Salve, Regina, mater misericordiae: vita, dulcedo, et spes nostra, salve. Ad te clamamus exsules filii Hevae. Ad te suspiramus, gementes et flentes in hac lacrimarum valle. Eia, ergo, advocata nostra, illos tuos misericordes oculos ad nos converte. Et Iesum, benedictum fructum ventris tui, nobis post hoc exsilium ostende. O clemens, O pia, O dulcis Virgo Maria. Amen.
Hail holy Queen, mother of mercy, our life, our sweetness, and our hope. To thee do we cry, poor banished children of Eve. To thee do we send up our sighs, mourning and weeping in this valley of tears. Turn then, most gracious Advocate, thine eyes of mercy toward us. And after this our exile show unto us the blessed Fruit of thy womb, Jesus. O clement, O loving, O sweet Virgin Mary. Amen.