I had a look at this feature in Imprudence, but it is pretty poorly implemented: instead of moving the "cut" items when you "paste" them, it copies them over and deletes the original items. This got several inconveniences among which the fact that you can't move no-copy items this way, and that since new items are created, you loose the time stamps of the original items in the process (also, since the original items are entirely removed from the server instead of going to the trash like what happens for "deleted" items, in case of an asset server issue, lag, disconnection or crash of the viewer, you may well loose entirely the items when you "Paste" them)... Also, the Cut/Paste feature of Imprudence proves unable to move folders around.
In summary, I reimplemented this feature from scratch with all the bugs and shortcomings fixed (also made it compatible with inventory links). It will be in v1.26.2.15 and v1.26.3.3.
I already said no to this feature elsewhere in this forum, for good reasons (search for the post and read them there: not going to repeat myself...). In short, a proper, scripted items compatible, viewer side AO can only rely on a server side feature (namely: per-avatar replacement of the default anims UUIDs) that is currently not available in neither SL or OpenSim.
Minor feature useful only to a very small minority of users. I'll keep it in mind, but I'm currently too busy with multi-layer clothing support implementation to loose my time on this.
This is already the case in the Cool VL Viewer !!!