@apastuszak: Only if it was updated (or already available as KF8 for supported devices).
There's an 'Updated Books' (or something like that, might be 'pending updates') link that appears on the bottom of the combo box on the 'Manage Your Kindle' page if you have books flagged for update in your Archive. I don't know when they implemented this, but it's way, way better than the stupid email requesting a reply that they used before

.
It might also take a 'Sync & Check' for the Kindle to phone back home & notify Amazon that it's been updated and now handles KF8 files.