A 525 partial
The Monster Manual details the definition of special attacks (they are distinct from special qualities, you'll see that all monsters have sections listing these, although some are also rolled into the creature's type). Since the designers were not big on players playing monsters, I don't know of any rule clarifying what parts of a class's abilities count as special attacks or special qualities; there might be something in Savage Species but don't count on it. You might also take this question to Ur-Priest's Monstrous Handbook (just look up his member profile, it's in his sig); if anyone knows the answer it'd probably be him, and reading the handbook might tell you what you need to know, or at least give you a starting point.
Q532
The vestige Buer does not mention any saving throw for undead targets of its Healing Gift power. Does the standard saving throw for supernatural abilities apply, or do the undead just take the damage with no save possible?