On H1B, can I help my friend with basic tasks like setting up his domain name, rackspace instances etc.

Yes, you should be fine.

Get an attorney ASAP.

Yes, you can. But you have to carry the prove that you are presently employed.

Is it better to apply for the visa u or the dream act?

You might want to apply for DACA first to get an employment authorization and deferral of removal. Once it's approved apply for U visa.

Is there any danger in filing an I-130 for an illegal alien beneficiary who is still currently in the country illegally?

If the father is not inadmissible then there is no problem filing for him.

RFE for I485. Issues: No I-864 from petitioner/sponsor and no supporting tax schedule from co-sponsor.

As the petitioner you have to file I-864 even if you have no income. The sponsor needs to provide his recent pay stab and the most recent tax...

My husband is rejected for US visa (F2) by 306 code. I am in US for 2 years far from him. What can we do in this case?

They probably gave him the reason. Talk to local attorney who can review your documents.

You can submit an affidavit signed by someone who knows that you have been married for long time.

Asylum and Withholding of Removal Statuses.

No. Anna Tsubel explained the difference.

Does my husband have a right to cancel my Green Card and send us back? What does AZ state law say about it? Thank you in advance

The best interest of your child is not a factor. You need to show that your marriage was bona fide when you have entered it.