There are other good summaries but here is mine, in no particular order (All is C&P, no editing other than adding in my own commentary in "[]", putting commenters questions in quotes, and adding in "Mark" where "he" and other pronouns were used. Also "..." is a clip):

* As far as I know, no one else at Mt.Gox ever had access to the backend of Mt.Gox, nor the cold wallets. At my time there, only Mark had access to the Database. ... Mark said that if he died there would be hints that one of his best friends could follow to find and unlock the cold-wallets. When I asked said friend, he said he had no idea what Mark was talking about.

* We then looked at the expenses (eye-witness expenses only [AKA, we collaborated and make a list of things we had seen were purchased for the company] so it's not accurate, but surely less than what was actually spent), and used the trading data to calculate some averages around Mt.Gox's profits. The expenditures far exceeded every model we had for income. [This is in relation to the AMA'er being asked to be CEO of Mt. Gox and what happened when he tried to do due diligence, Mark wouldn't give him access to the books]

* Around the same time, we learned that Mark only had one bank account, shared with Mt.Gox's customer deposits.

* Mark was receiving a lot of pressure for "proof of solvency". I was behind him when he VNC'd into... somewhere, used the bitcoin otc app to send the money from A-to-B, and then posted about it. [In case you didn't catch that... THERE WAS NO COLD WALLET. ALL of it was hot and on a machine (running in graphical mode of all things...)]

* "How likely do You think it is that Mark Karpeles was running the Willy bot?" -- To be honest, before you asked this question I had never considered it wasn't Mark. ... I just know my ex-employee contacted me about with the impression that Mark owned this account, I hadn't questioned it, and it was presented as "Mark is at it again"

* I think gross incompetence happened, and Mark tried to cover it up. I don't believe he is outright malicious, but certainly ignorantly-malicious.

* [Mark's] salary was the same as mine at that time. ... I started at 240000yen/month (~$3.1K/mo - ~$37K/yr), and was paid 320000yen/month (~$4.1K/mo - ~50K/yr) from about August 2011. I was the highest paid employee (including Mark) when I left the company.

* "Where do you think the millions of depositors fiat have gone to?" -- Nooooooo fucking idea. I hope to read about it the same as you do. I want answers.

* "Why was Ross Ulbricht's Gox account banned very early on?" -- Honestly, no idea. I know that Mark banned any accounts blatantly linked to SR. Some people emailed that they needed to use their undeposited cash to buy things on SR. If that made it to Mark, he banned it. I think it was safe practice.

* "Since this is AMA: How come you chose this particular time to come out with this AMA? Why now and not earlier?" -- I think I mentioned in different comment threads, I had an NDA that prohibited me from talking about Mt.Gox. It's still enforceable, but I think Mark has other things to worry about at the moment... I hope :/

* I stopped believe anything he [Mark] said after a month of working there.

* "Reuters reported that expensive toys were being purchased by MtGox/Mark. Do you have any more examples of luxurious spending?" -- He bout a NAO for $5k in August 2011, a Makerbot a little later, and... Ahem, I had to talk him down from buying a Lamborghini as his first car. Respectively, the Honda civic was a modest purchase. (how to fuck could I explain a Lamborghini to 50% of the employees making under $2000 a month... it would have killed moral, even moreso

* "I find it incredibly irresponsible that no employee or ex-employee blew the whistle on what was going on." -- There was no proof, no one (mark) gave anyone access to anything directly. Everything was inferred. (Spent 900K, made x00K?) where did that come from? No answers... what can you report on that ... :/ It sucked....

* "Do you think Mark is guilty of actually manipulating data in a fraudulent manner, or merely negligence in operating MtGox?" -- Both. but only the latter do I have an experience.