Understand the filing instructions...
Being on H-1B, I already have a SSN. But in one of the posts I found someone commenting that, there is some work to be done at the SSN office after getting the EAD before I can start a job without any sponsorship. Is that right?
Sen,
If you have a social security card, they why would you need another social security card at the SS office?

You are basically acting like a nut....
If you have balls, why would you ask the doctor to implant another set of balls, just because you moved from Arizona to Las Vegas? If the balls were working fine in Arizona, then in Las Vegas they should definately be in good working conditions....

Basically, moving from an H1-B visa doesn't necessitate a new SS card.
Simple advise: spend a day reading the forms which you need to complete so that you can understand the process, because all the questions which you are asking aren't going to guarantee a successful filing of the petitions, especially since you have difficulties understanding a simple process of a social security.
Personally, I have no problems helping you with the process, but you have to be educated and knowledgeable cause once you send the paperwork and you have wrong information in those forms, USCIS is going to barbacue you, give you hell on earth till you are forced to hire a lawyer. In most cases, people who end up in the lion's cage of USCIS didn't follow the simple filing instructions in the forms, because they were anxious to send the forms of USCIS, and in the process, get their assess handed to them on a silver platter with a golden patato....
An EAD is an employment authorization which is issued to you for being a spouse of a US citizen, and no one owns the EAD except you and USCIS. If you get one, and want to change your employers, then your H1-B becomes immediately invalid once another employer hires you on an EAD. Moreover, should the employer who hired you on an EAD no longer offers you the right money or benefits, you can go back to your previous employer (if he still cares for your experience) on an EAD, but you cannot go in and out of the H1-B visa as it pleases you....
Applying for a Green card is simple, but you have to do the homework of thoroughly understanding each and every form that is required for the GC application. However, from reading your questions, you still need work on understanding this simple process, and don't rush file before you clearly understand this process, because your intention doesn't satisfy the requirements of USCIS. What do I mean by intention?

USCIS expects you to accurately complete all forms, and what you meant or intended to fill in the application form is not for USCIS to assume or interpret. For example, in the I-485, part 2 asks you the basis of your filing this AOS petition. Assume that you chose G in the form, USCIS is going to process your application with G as your basis and reject it, even though a rational person would know you meant A as an immediate relative of a US citizen, and not subject to a visa cap.

So, USCIS officer adjudicating your petition isn't going to infer from his flatulence that you meant A...
