[Dovecot] keeping 2 dovcots in sync?

[joakim at verona.se]

I would like to have one master dovecot instance that gets email, and a
slave dovecot on my laptop.

I use maildir, and I was thinking of doing this with unison, but I
suppose dovecots indexes would go out of sync whenever I used unison.

There seems to be a number of imap folder synchronizers, but I have
heard they are troublesome.

Any hints?
-- 
Joakim Verona