Just an update - I ended up getting the regular size pochette accessories in Mono. I love it! I got it on my recent trip to Vegas, and it was absolutely the perfect little bag for Vegas, since I don't carry as much stuff there. I also got the bolt key holder, or whatever that key chain is called, to use as an extender, and it made the bag fit perfectly under my arm. Now I plan to use the pochette it in my Speedy without the strap for everyday.
I checked out the mini accessories as well, and it was very cute, but much smaller than I thought it would be. It wouldn't have worked as well for me to use as a little purse. I am hoping that it will eventually come out in Damier T&B, and then I would like to get it then.