There is a whole chapter in the quran devoted to mary. In fact its titled "Mary"
[FONT=Arial,Helvetica][SIZE=-1]"And mention in the Book, Maryam [i.e. mention, O Mohammed, in the Quran the story of Mary], when she withdrew from her family to a place facing east. She placed a screen from them; then We sent to her our angel (Jibrael, or Gabriel), and he appeared before her in the form of a man in full human form. She said:[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]'I seek refuge with The Most Beneficent [God] from you, if you do fear Him.' (The angel) said:[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]'I am only a Messenger from your Lord, (to announce) to you the gift of a righteous son.' She said:[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]'How can I have a son, when no man has touched me, nor am I unchaste?' He (the angel) said:[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]'So (it will be), your Lord said: 'That is easy for Me: And to appoint him as a sign to mankind and a mercy from Us (from God)', and it is a matter (already) decreed (by God).' " (Quran 19:16-21)[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]"So she conceived him, and she withdrew with him to a far place . And the pains of childbirth drove her to the trunk of a date-palm. She said:[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]'Would that I had died before this, and had been forgotten and out of sight!' Then a call unto her from bellow, said:[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]'Grieve not! Your Lord has provided a water stream under you; And shake the trunk of the date-palm towards you, it will let fall fresh ripe dates upon you. So eat and drink and be glad, and if you see any human being, say:[/SIZE][/FONT]
[FONT=Arial,Helvetica][SIZE=-1]'Verily! I have vowed a fast unto the Most Beneficent so I shall not speak to any human being this day.' " (Quran 19:22-26)[/SIZE][/FONT]
[16:102] Say, "The Holy Spirit has brought it (Quran) down from your Lord, truthfully, to assure those who believe, and to provide a beacon and good news for the submitters."
Both the Holy Spirit and Mary giving virgin birth to Jesus who will be a savior to humanity are central ideas in ALL schools of thought in Islam. Its in the quran, which all sects report to as the final word.
And yes, its the same mary and jesus, and the same holy spirit. The thing that differentiates it from the trinity of catholisism is that neither Jesus nor the Holy Spirit have any physical or spiritual connection with God. They are very holy, but God is completely independent in Islamic idealogy
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