Found 1 (and only one, ugh) plugin that helps with the movement of items between toons. HugeBag. The only feature I use, other than it opening all bags at once in a centralized location, is the merge feature. It will merge stacks of similar items, tho I've seen it fail on large stacks of leather. It does save me from having to re-stack everything every time I trade amongst my team.

Now, if I can only find something to let me auto-transfer items to the trade window, and possibly auto-sell or auto-delete I'll be set .