The way it works is you take your 2nd Ed. rule book to the store, they put a sticker on it (so you get to keep it), and they give you a 3rd Ed. mini-rule book. Pretty cool one too. Great Hall games is already doing the swap out. Got mine today!
Originally Posted by Salubrious_vampire
Wasn't there something about an edition change for flames of war? If I remember correctly, it was something really cool like in February people could trade in their 2nd edition books for miniature (but still 100% complete) 3rd edition books, then the corebook comes out at retail next month.
Something to doublecheck if you're starting flames of war but don't have the books yet.