As you may see in the following table [attached from this MS page:
http://support.microsoft.com/lifecycle/search/default.aspx?sort=PN&alpha=System%20Center%20Configuration%20Manager&Filter=FilterNO],
the Mainstream Support end date for the System Center Configuration Manager 2007 is: 7/8/2014 

Products ReleasedLifecycle Start DateMainstream Support End DateExtended Support End DateService Pack Support End DateNotes
System Center Configuration Manager 2007 11/29/2007 7/8/2014 7/9/2019 7/14/2009
System Center Configuration Manager 2007 R2 11/29/2008 7/8/2014 7/9/2019
System Center Configuration Manager 2007 R3 12/19/2010 7/8/2014 7/9/2019
System Center Configuration Manager 2007 Service Pack 1 5/21/2008 Review Note Review Note 1/11/2011 Support ends 12 months after the next service pack releases or at the end of the product's support lifecycle, whichever comes first.
For more information, please see the service pack policy at http://support.microsoft.com/lifecycle/#ServicePackSupport.
System Center Configuration Manager 2007 Service Pack 2 10/22/2009 7/8/2014 Review Note Support ends 12 months after the next service pack releases or at the end of the product's support lifecycle, whichever comes first.
For more information, please see the service pack policy at http://support.microsoft.com/lifecycle/#ServicePackSupport.