Hi all. I'm glad I found this forum because I have gotten really into SR. I played SR3 a decent amount but it never really resonated with me. However I recently played some SR4 and for some reason my interest level has gone through the roof. I don't know what it is but I am berserk for SR now. I have been writing up scenarios and I'm even working on a character history generator (just for fun but I may post it at some point). Anyway, yeah I like SR.
So I have been working on some campaign/mission ideas and I came up with a few questions, mostly involving the metaplot and SR history. I have access to all SR4 books and a good number of SR3 and a few SR1,2 books but I can't find a few things.

So the Questions:
Are there any members of Echo Mirage detailed in any SR products (besides Damien Knight)?
Is there any specific info on the virus that Echo Mirage eliminated?
Is it possible that an AI could merge with a sprite?
Can a sprite possess a person and if so would the only circumstance, where that would be possible, be if the possesee had some kind of headware or was a technomancer?
Are any of the Shadowland contributors in the SR books detailed in any product? Like Captain Chaos, Terwilliger, Synner etc?
What might be the likely reaction of the world, if a longtime contributor/admin type of Shadowland was captured and taken captive by Lone Star? Then LS started arresting large numbers of known and respected runners, presumably because this guy is handing them info on shadow-ops and runners. Would the corps go nuts and bust him out (who knows what this guy knows about all the dirty corporate secrets?)? Would LS not do this because it would bring down too much heat? Would a lot of runs happen to kill this Shadowland contributor? Basically thats kind of the hook for a long story arc I'm working on and maybe you folks can give me some perspective.
Sorry if thats an explosion of questions but I figured one thread would be better than six.
So any answers/ideas?