Will my VAWA petition get approved when my ex-husband is in deportation proceedings?

This is a very difficult question with no clear guidance.

Do you have the same mother?

Deffered action

Maybe, will not know until the final rules are released.

Do I have the right to get experience letter from my previous employer, as per US law?

No, your employer has no legal obligation to provide you with a letter.

How can I vacate a felony since Iám fixing my emigration status and if I can be refered to an attorney

It is possible to vacate the conviction if there was a defect under 1016.5 or Padilla. Additionally, if this was simple posession, an expungment...

My current spouse hasn't been married before. Is the answer to part 8G in form n400 cero(0) or one (1)?

If you did not see this one as clear, perhaps you should hire a professional in your are to assist you.

Came to the U.S when i was 7 years old. I've been here ever since.. Would i qualify for the new dream act?

You should qualify for the new deferred action program.

I am Mexican w. Alien Registration in California. My wife is a Mexican in Mexico. Can we have an uncontested divorce in CA.?

Sure why not.

Canadian citizen, with US Resident going back to canada for work, but have dismissed misdemeanor. Will i have any problems?

Returning to Canada will not be a problem.

Can I renew my EAD (issued based on TPS) while I-140 pending?

Discuss with an Attorney before filing anything.