Plain and simple...
If it ain't in the SRD, you ain't suppoed to play with it without askin'.
Staffan said:Plus in Unearthed Arcana and Monster Manual II (the two monsters in the back). I also think there's a Dragon or two that has some OGC in it, but I'm not sure.
Angellis_ater said:If you check the OGL ( http://www.wizards.com/d20/files/v35/Legal.rtf ) Wizards list Mind Flayers and Beholders among others as being Product Identity even though they are not included in the SRD. THIS is the reason I asked about the Slaad and Kua-Toa. There is no definitive listing of them being Product Identity, but on the other hand they are not in the SRD.
Now why have PI references for SOME of the monsters not included in the SRD?