I think one of the biggest letdowns for the Kobo Mini is the lack of options for cases. I've had to get crafty with my sewing machine (I have hardly ever done any sewing!) and thanks to a scrap of material I had around, plus an old piece of crafting felt (for a nice soft inside) have come up with my own customized pouch (pics attached of my first "prototype" which has been in constant use for my Mini so far). Not bad for a first attempt I think!
I'm still keeping my eyes open for a deal on the official Kobo Mini sleepcover in grey fabric... but aside from that, any other options I've looked at add too much bulk, or just don't look very good. I will probably end up sticking with my fabric pouch idea; next time in a much more funky modern fabric.
I know some people on the forum mentioned using oversize GPS cases, etc, but that just won't work for me. Has anyone had any luck finding any other options?