I know there's been a lot of ideas for a spell component pouch to store components, the dev's have said in the past that having a spell component pouch like the collectible bags or the like isn't possible, if I recall because the Spell components couldn't be automatically withdrawn from the Pouch
So I was thinking of an alternate idea, instead of a pouch, using something like the Wallet system from LOTRO (for those of you who haven't played it, it contains character cash, Mithril Coints (Astral Shard equivalent) Commendations, Skirmish Marks and Medallions etc. a lot of these are an account wide storage accessible from any Character)
So why not use a similar system for Spell Components, the Pouch could be account wide, so for example if you were on your Paladin and picked up Ranger components, they would go in the pouch and be available for your Ranger when you next played one.
The pouch would significantly save player inventory, make the random pickup of the wrong Spell Component types actually useful, and the pouch could be something that was sold as an upgrade in the DDO store.
Also there's already account wide currency (Astral Shards) so adding a few more shouldn't be impossible.