What part of the above statement do you want me to explain? This is really very top attorney - his name and reputation is worth more than a few hundred thousand dollars. Even though he was officially ranked one of 20 best immigration attorneys, a number of distinguished lawyers think he is one of top two, not just 20 and not even 5. The judge in the process already mentioned the plaintiffs want to defy common sense and make a hash of the law (that was about the idea the original May lottery was in fact random). That is an unusually concrete statement from a judge and that shows how ridiculous that idea (that May lottery was random) is. One of those two things does not correspond to the other one. That is why the first thing that comes to mind is that is all scam. Unless the attorney has completely different new ideas that have never come to any of attorneys before, but that would be hard to believe.
On the other hand, the only source we know about this attorney willing to accept the case is Armande Gil. All correspondence with Kurzban that exists regarding this case is coming in her interpretation - there is no way to verify it's authenticity. Everything she says about himself could be taken from sources like wikipedia. I am not saying that is she who is faking it, there could be someone instead of him, and she might truly believe she is talking to Ira Kurzban, while in fact the origin of the scam is not her. However, trusted Kurzban's site is silent as well as press.
So, the thing is it is much easier to believe this is all scam than that Kurzban is in fact willing to take the case, and it seems to be the best explanation of what is happening now.
When sending money to "attorney" is question you need to make sure money really come to an account 100% under Kurzban's control. If you do not have enough proof of that, you might become victims of another scam. Of course, if someone says the money come to Kurzban's account, you need to have confidence enough in three things:
1. That someone herself or himself believes that is true.
2. That someone is not a victim of scam herself or himself.
3. That someone is in not crazy.
BTW, if Kurzban is really behind those negotiations, he should have interest in making sure everybody knows he is in fact behind, because his name and reputation is at stake. That means he should provide a secure pay interface for funds transfer himself, on his trusted website, and not rely on intermediaries, even the ones he trusts (I am talking about Armande Gil's facebook page
http://www.facebook.com/dvlottery?sk=wall and her blog
http://blog.greencard2012.org/ as well as her fundraising page
http://www.greencard2012.org/index_new.jsp ).
If someone behind your back collects funds on your behalf, you have to tell everybody yourself that is true if you value your name and reputation.