H1-B, I-140 and new avenues

[predicament]

Hello everyone,

This is my first post. I am in a rather strange predicament.

1. The 6th year on my H1-B expires this November. I was able to get an extension on H1-B to March 2013.

2. PERM Approved from Company X.

3. I-140 has been filed with no approval.

4. Company Y wants to hire me, and is willing to process my Green Card. They are willing to re-file PREM.

5. Company W, my previous company is also ready to hire me back. They are also willing to continue my PERM.

Here's my predicament:

1. What should I do? Is it risky to join company Y?

2. Do I risk losing my I-140 and PERM? I was told that my PERM could be cancelled by Company X, my current employer.

3. At what point of time is it safe to port my H1-B and I-140 to a new employer, or old one?

Any suggestions?

[pontevecchio]

You can only retain the PD of an approved I-140.