Also the sealer in new londo will go to firelink shrine if you talk to him after killing the four kings.
If you backstab something/someone then you will be put at the perfect range to jump attack them if you wait for them to get on their feet(stop being invulnerable do to the animation). (Tested with the greatsword of artorias, my favorite weapon for my main character)
Also the silver knight shield seems to be rarer than the black knight shield (no idea why).