Wow. Mine still hasn't even shipped yet. I'm going to take that as them needing extra time to process all the extra mics.
There is no "extra mic" to process. It's all in one big box, so they either have them or not. The product page for the "sold by amazon" item has said it includes wii speak at least ever since they had it as a daily deal earlier this month, so everybody who ordered it since then, including black friday, will get the mic.
I even ordered it a few months ago without the "includes wii speak" notice, and they even sent me the mic version back then, although the box was pretty beat up. The "includes wii speak" icon was originally only there for the first few months it came out. I'm guessing nintendo bundled more of these, since my latest order looked pristine.