This would be great for people dealing with a large number of products and a real time saver.
Right now, if you select items from your inventory in batch and bring up the properties widow... You get a tabbed window with a tab for each and every item selected... Leaving you with the chore of still individually changing permissions one-by-annoying-one. Why can't it be (with proper dialogue) that the batch can be edited all at once. There are many other properties systems that work this way in and out of SL... Think... Textures per face, per prim. That can be changed in bulk on rezzed objects. Why not permissions in the inventory?
Actually... I'm a bit surprised I haven't seen this mentioned. If it's there... Point the way and I'll vote for it... And an improved search engine at the same time. (_)y
I think there actually is an issue for this and if I find it I'll make a note here but this is an idea that has been wanted for awhile but for some reason never implemented.