The change appears to have been to make summoned weapons get credit from more talents.  They have worked work with every appropriate talent I tried on my wizard chars.  The talents recognize if the weapon is ranged or melee.  (so a melee talent won't work on a summoned wizard wand for instance).  They receive an accuracy bonus regardless if they correspond to specific weapon types listed in the talents (e.g. the accuracy talents).  I haven't tried stacking multipel bonuses though.   
  
They are still the base weapon type.  Hence a wand is still a wand, but it also a "universal" weapon if it was summoned.  So it can get credit from wand talents (e.g. dangerous implements, blast, etc), and talents flagged to apply to universal types. 
  
If u want to try something particular, just save game, go to an inn, reroll, and attack inn patrons and see if the bonus applies. 
  
  
I appreciate the response. 
  
Is there a list somewhere? I wouldn't even know where to start. (not to mention it'd take a while) I mean, of course a wand talent should work with a summoned wand, a two-handed talent with a summoned staff, but I've no idea what sorts of talents the devs decided, "Yup, this talent and this talent should apply to *all* summoned weapons, no matter the type". 
  
I mean, I'm attempting to build a melee wizard using the parasitic staff and I'd like to know what talents that aren't obviously connected to this type were so important the devs created a new category for.