For number 3. I don't believe that the US government has indicted, charged, or has otherwise show interest in Julian Assange. The best information I can find on the topic are quotes [1][2] from the US Ambassador to Australia saying that the US is not interested in Julian Assange. The articles also quote the Ambassador as saying that the US-UK extradition treaty would be more convenient than the US-SE one.

[1] http://www.theaustralian.com.au/in-depth/wikileaks/we-dont-c...

[2] http://www.theaustralian.com.au/news/breaking-news/were-not-...