Nope, And I quote
confirmed that AM2 processors will work on AM2+ motherboards and AM2+ processors will work on AM2 motherboards. However, the operation of AM2+ processors on AM2 motherboards will be limited to the specifications of Socket AM2 (1 GHz HyperTransport 2.0, and one power plane for both cores and the IMC). AM2 processors do not benefit from the faster HyperTransport 3.0 and separate power planes on AM2+ motherboards.
Many manufacturers have yet to (and may choose not to) release BIOS updates that would enable this compatibility. Others have simply stated that their AM2 motherboards are not compatible with AM2+ processors. 
AMD confirmed that there is an upgrade path from Socket AM2+ to AM3:
- AM3 processors work on AM2+ motherboards
- AM2+ processors do not work on AM3 motherboards