I just realized that the core rules don’t cover this, so I decided to make one up. If there’s something similar on these boards or anywhere else, directions to that source would be most welcome. Otherwise you’re free to comment on this special weapon ability. Don’t know if it’s good enough for a +2 bonus, but it’s better than the returning quality so I figured +2 would be alright. What do you think?

Reappearing: This special ability can only be placed on a weapon that can be thrown. A reappearing weapon instantaneously reappears in the throwers hand. It reappears just after an attack has been made, allowing a character with multiple attacks to use his full attack rate. Grapping hold to a reappearing weapon when it rematerializes is a free action.
Moderate conjuration; CL 7th; Craft Magic Arms and Armor, dimension door; Price +2 bonus.