BTW, in case this isn't already on your radar, one feature I would love to see with the physical keyboard is the ability to toggle keys like Shift, the arrow key, etc. For example, sometimes it's more natural to want to type a capital letter on the left side of the keyboard with just my left hand so I'd like to be able to click Left Shift with my left hand and then click a letter. Right now, I have to hold down Shift. I know there are the same buttons on the right side of the keyboard to do the same, but that's not always convenient.
Note that the pro1x has a Caps Lock key, and it should work in most cases where Shift would be used. Also, the default key character map we are currently providing defines parallel combinations for most of the yellow glyphs printed on the keyboard, so you can use either 'Fn' (the yellow arrow keys), Shift, or Caps Lock to type them. Unfortunately there are a few cases where this wasn't possible, e.g. '\' and ';'.
There are also a few other changes from stock: The 'F' logo key is now Meta, which means the old function of this key has moved to Meta+Enter (instead of the key being dedicated to bringing up the home screen). This enables all the other Android shortcut keys, which can be listed with Meta+'/'. This list of shortcuts changes based on context, so be sure to check it in each app to discover what new shortcut key combinations are defined (if any). We have also remapped Sym so it now generates AltGr (ralt), which is used by many of the native Android language overlays to type special characters. Just remember that if you enable any lanugage overlay, the Fn mappings will be overwritten and you won't be able to type '\' or ';' at all
One final note: Android uses Alt+Meta internally for 'Caps Lock', and because they are adjacent on the pro1x it is easy to accidentally type both keys at the same time. If you notice that Caps Lock is stuck on even though the LED on the Caps Lock key is not lit, try typing Alt+Meta to turn it off. This one drove me crazy on the pro1 until I figured out the cause