Addons: Bagnon

This one is for those of us with lots of junk on lots of alts. This addon will combine your bags into one large bag. The caveat that got me was the ability to type any item into a search window and find it. It also tracks quantities on each of your characters, even if you are logged into a different room. (once you log in one time with all your rooms) Ever wonder if any of your alts has any volatiles or enchanting mats on them? This makes that search much easier.
http://wow.curse.com/downloads/wow-addons/details/bagnon.aspx

Bagnon's capability to store information
on your other toon's bags

Bag Search. The good kind.