Not sure if it's related, but the Wifi version of the Story HD was just released in Germany (used to be basic non-wifi only before now), and it doesn't use Google Books but a localized shop for ebooks. It also comes with a German keyboard layout (qwertz with umlauts). So there's bound to be firmware changes for the German Story HD Wifi.
What I don't know is if iriver is maintaining that firmware themselves or joining it with the standard / US version of the wifi firmware, or if the German retailer is somehow making their own firmware independently for the device.
If there's a new firmware it will show up on their homepage sooner or later I guess and then we'll know