Protip: Set up a pin for in app purchases if you are using Amazon Instant. Since they've added rentals etc. now it's easy to buy things by accident as there is no confirmation dialogue box.
How do you do that?
Will they be merging accounts? Like, I currently have a lovefilm, and also amazon prime... will they stop charging me for my lovefilm as of now?
So streaming is still only available on Apple and Kindle HD mobile devices?
Mobile devices yes, but most consoles are supported, some set top boxes etc.
Do you happen to know if a skyhd box is supported?
what does this offer me over a netflix subscription with unblock-us proxy?
You pay £79 per month, this is Prime Delivery and Prime Instant Video, your LOVEFiLM subscription drops to £2.99 per month for the DVD rentals. If you don't want DVD rentals then cancel your LOVEFiLM and use Prime Instant (Same as LOVEFiLM streaming).