I just noticed that my CCNP has expired. Did you say you can be recertified as a CCNA if you pass one of the CCNP...
exams, or must I take the CCNA over again to start my recertification as a CCNP?
Unfortunately, you must have a valid, non-expired CCNA in order for any of the 642 exams, such as those in the CCNP to recertify. At this point, you must re-take the current CCNA in order to become certified in the CCNA.