Is he still able to apply for his green card by any other means?

The short answer is yes. He still can obtain his green card by other means or ways.

If the document says multiple entry, then you are allowed to go in and out.

Mr. Behar explained it very well. I refer you to his explanation.

Is it possible for an E2 visa to be denied under 214b?

Yes. E2 visa a non-immigrant classification. Therefore, subject to 214b.

How it works? When do I and my friends hear from USCIS of our H-1b result? Thanks

Are you going to check your attorney?! If you had tracking number and USCIS had received on April 01, the April 11 generally refers to the date...

Can I still file i485, if my US citizen husband has passed away? Would I be eligible for a fee waiver, as I cannot work?

The short answer is YES. However, it is best advised to consult with an immigration attorney.

How can I find R1 Visa lawyer?

Search aila.com and look for R lawyers. There is no cheap attorney as if you find one you should be concerned. You also can search avvo.com Hope...

it differs from consulate to consulate.

Money order question

Money order does not need USCIS's address.

You should discuss this matter with the attorney who filed your H-1B.