the other boxer is saul "the ghost maker" maven. i can't remember 100% where i found this, but i'm pretty sure it was from the coheed facebook page. fight poster
There's a video of Claudio playing Sentry acoustic, before Ascension even released. They've played the full band electric version in concerts. Dark Side of Me leaked a few days ago. Here's the mp3 I saved.
No, other than the single released in 2008, nothing new has been released.
Here is that track.
http://www.amazon.co.uk/AMORY-WARS-ULTIMATE-ED-HC/dp/1608860353/ref=sr_1_1?s=books&ie=UTF8&qid=1433499502&sr=1-1&keywords=the+second+stage+turbine+blade The deluxe hardback of SSTB, it is a beautifully bound and exceptionally well made hardback, contains all of the SSTB Amory Wars issues afaik, as well as the original SSTB comics.
Also http://www.amazon.co.uk/AMORY-SECRETS-SILENT-EARTH-Amory/dp/1608861023/ref=sr_1_2?s=books&ie=UTF8&qid=1433499687&sr=1-2&keywords=amory+wars the IKSSE:3 hardback, all issues and bonus again in an exceptionally bound hardback. Both of them together will set you back less than £30.
The IKSSE:3 comics are better than SSTB imho, although they are both really fun reads. Hope this helps.