Switching to Maildir

[Tobias Richter]

I'd like to switch to Maildir delivery here. 
So far I have no problem except that I don't like to bother my users 
too much.  They now all have ~/Mailbox'es lying around and I'd have to 
convert the contents into Maildir format transperently. 
So I need to opposite of maildir2mbox or is there anything obvious I 
could do to achieve this?

(using qmail-1.03)

tobias