How can an Australian get a permanent resident status/ immigrate other than E-3 and I investment visa? Is E-2 viable option?

You have to find an employer who will be willing to file I-140 for you, that is most easiest way for you to obtain permanent residence.

Is an appeal worth it in this case?

You found out you are subject to a 3 year bar, who told you that? If USCIS sent you a notice take that notice to an Immigration attorney for...

Can my wife (naturalized citizen) sponsor a sibling on a work visa instead of the normal route I-130 petition alien relative.

Yes, if the business meets the requirements and if your wife's siblings has all the necessary qualifications you can sponsor her for a work visa....

You can switch jobs, it will not affect your spouse's EAD and she does not have to re apply for that. And even if your previous employer withdraws...

Can I still work when my OPT extension case is pending?

You can not work without a valid work permit. You will have to wait until your extension gets approved. If your employer is cap exempt he can file...

Need to know if i am eligible for and can file for asylum in US?

You can always submit a request but whether or not it will be accepted or not, you will only know when the decision is made. You seem to have a...

Final stage of i485

For the I94 you can file a FOIA request, you will be able get that document. As far as your I-20 is concerned you can contact the school to find...

L1B to H1B conversion

It will be mailed to you in 8 to 12 business days and since it is approved, you no longer have L1B status. Because you can not maintain two non...

Yeah take both of them and also other supporting documents related to your job. Why is your employer's immigration attorney not giving you advice...

L2 to H1 conversion

Yes if you apply for COS again within the four years you will be cap exempt. All the best.