What's unclear to me with SlimPort yet: can the peripheral (monitor) transfer data from e.g. own touchscreen or an USB-attached mouse and kbd to the Neo900.
Obviously you can't use Neo900's USB hostmode/OTG while SlimPort connector attached.
Even when a AUX data is implemented on hw side, the kernel drivers for ANX7805 must support a pointerdevice/HID/USB provided via displayport

re charging: yes, according to the adapters' descriptions they all come with a micro-USB receptacle to feed power to the device. The adapter itself doesn't need external power. See e.g. http://www.mobilefun.co.uk/37046-Ana...ws.htm#reviews