Here is a quick post that will help use your currently selected character to generate lists of all FK and IK models. When ever possible I like to use these funcitons as opposed to generating the list by hand and storing that as a variable.
I can’t remember where I stumbled upon this method, but I am happy to have it!
##Get A List Of FK
fkList = 
for id in fb.FBBodyNodeId.values.itervalues():
if id == fb.FBBodyNodeId.kFBReferenceNodeId:
model = fb.FBApplication().CurrentCharacter.GetCtrlRigModel(id)
##Get A List Of IK Effectors
ikList = 
for id in fb.FBEffectorId.values.itervalues():
model = fb.FBApplication().CurrentCharacter.GetEffectorModel(id)
As always, I hope this helps.