I am in the US and married to a green card holder. Can I file for EAD whiles I wait for a visa number?

More information is needed. Facts are in conflict. Is your spouse a visitor or permanent resident? Do consult with an experienced immigration...

You need to consult with an immigration attorney ASAP.

If I apply for change of status B2 to L1, will my present B2 be revoked immediately?

I agree with my colleagues.

I was on EB2 with my previous employer but current one is filing on eb3. What can I do to get back to eb2?

Do consult with an experienced Immigration Attorney for guidance in this matter.

Can joint sponsor for affidavit of support use assets to meet poverty guidelines ?

Yes.

What can be done when a CH 13 trustee paid held mortgage money to unsecured creditors?

Your attorney is in the best position to answer your questions on this matter.

Will the fact that I'm applying for asylum now will affect the case of my brother who was granted asylum few years ago?

I agree with my colleagues.

Is it better to hire a lawyer to assist me filing the i-730 to bring my wife? Will it accelerate the process?

Yes, you will be best served by the services if an experienced Immigration Attorney. It would be faster to have it done right the first time.

International Student , arrested , spent few days in jail and the case was sealed and expunged eligible for U non Immigrant visa

I agree with Attorney Swenson. Do consult with an experienced Immigration Attorney for assistance.

Heard about the new advantage for green card holders. My spouse has overstayed. Is there any way I can still move forward.

I agree with my colleagues. Do consult with an experienced Immigration Attorney for assistance.