I was told by USCIS that I was issued a certificate of naturalization in 2006. However I never received this.

That makes no sense at all. If you never applied for citizenship, you would not have been issued a certificate.

Do we have any news on CSPA case after Dec 10' 2013 ? Do you think it can come this month ?

There should be a decision forthcoming within the next 60 days.

Your employer could file a new I-140.

Is there any way, I can apply for a work permit to support my family?

If your spouse is eligible to naturalize soon, you could apply for adjustment of status and obtain a new work permit, or perhaps you can extend...

Can I work for another employer that is not e verified during my cap gap period?

In order for the automatic extension to apply, you must not have violated the terms of your nonimmigrant status.

Can my parents who are residents petition for me after my 3 year ban from the U.S is over due to an overstay?

The can petition as soon as a qualifying relationship exists for a petition, however, you cannot obtain a visa until the bar period lapses or is...

As long as you can establish your true identity, that should not be a problem.

Is 180 days count comes into existence from the day of H1b Denial or I-94 expiry date?

Unlawful presence begins to accrue on the date your I-94 expires or the date a a properly filed application to change or extend status was denied.

EAD for L2 dependent while L2 under initial review status

You can follow up with the L-2 via the USCIS customer service line.

Question about on I-94 Validity on H1-B transfer and previous revoked petition

Portability would not apply to a previously revoked H-1B Petition.