Yes & yes. As long as the AOS is pending you still retain the underlying nonimmigrant visa status unless you change same by traveling abroad and entering on the advance parole or filing an affirmative COS.
This is not legal advise and should not be construed as such by anyone.
Your wife can travel to the United States while your application for adjustment of status is pending assuming you are still in valid L-1 status. Your wife would still be able to travel after you receive those documents. However, she will not be able to travel with the L-2 visa if you are not in compliance with the terms if your L-1 visa (such as not working for the employer) or once you adjusted status.
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If you are still maintaining your L1 status, yes, otherwise - no.
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