I've just uploaded dovecot 1:2.4.0+dfsg1-1~exp1 to experimental. Please test to the extent that you're able.
I did *not* go ahead with the previously proposed package rename (at least not yet), so the binary packages are still named dovecot-* Note also that there appear to be build issues on (at least) i386, which look on first glance like they're related to the 64 bit time_t change. I'm not sure it's worth fixing those, but am happy to hear other opinions and/or review patches. noah