Link to a few sample Integration Test Plan Templates:

SQE Unit/Integration Test Plan Template from the STEP (tm) process By Software Quality Engineering
http://www.stickyminds.com/getfile.asp?ot=XML&id=2963&fn=XDD2963filelistfilename1%2Epdf

TEST PLAN (UNIT AND INTEGRATION) Sample:
http://www.hud.gov/offices/cio/sdm/devlife/tempchecks/tpuitemplate.doc

Integration Test Plan Outline from Gantthead.com:
http://www.gantthead.com/deliverable.cfm?ID=5860

System and Integration Test Plan Sample:
http://www.floridajobs.org/osmis/OSMIS/Current%20Deliverables/Test%20Plans/System%20%20Integration%20Test%20Plan%202.0.doc

Integration Test Plan Sample:
http://link.unm.edu/Finance/Integration%20Test/Integration%20Plan%20PDD%20v1.1.pdf

http://blackfin.uclinux.org/docman/view.php/14/20/NetAudio_ITP.doc