Chovan,
Just wanted to say how much I appreciate your list of periphs for the HP Stream.
I bought a few to see and some were perfect for the HP Stream 7, with a couple of additions.
The Nekmit? 4.8A 24W Dual Port USB Travel Wall Charger is the perfect replacement for the HP charger which is just not powerful enough to be of much use.
Use it with the Y usb A to usb micro B cable and you get all the power you need to run multiple accessories.
The Dell Micro USB Dongle for Data and Charging allows you to plugin a mini hub, I use the Belkin USB 2.0 Ultra-Mini Hub.
I added in this keyboard, the Karnotech? Foldable Silicone Keyboard USB Wired Silicon Flexible Soft Waterproof Roll Up Silica Gel Computer Desktop (103 Keys) .
And, of course, my little travel storage device of choice: a USB stick.
It looks like a mess of cables, but together it makes for a complete computer, if not a nice big LCD screen.