Filing Email Messages within Apple Mail

I really wish I could file email messages within Apple Mail using the following sequence:

1. Select one or more messages.
2. Hit a command key, and be presented with an input field.
3. Type a few letters of the mailbox in which I want to file the message(s). A filtered list of mailboxes would be presented.
4. Select the mailbox, either using the arrow keys or via mouse click, and hit return or enter.

Basically, this would be similar to the fantastic process of working with tools like Launchbar or QuickSilver.