Careful, if you don't give the notice requested by the employer you'll be flagged as not eligible for re-hire. Major CJO's have been revoked in the past for leaving the previous employer on bad terms. "Bad Terms" is in the eye of the beholder and usually means doing something like no-show your last trip without calling in, etc.

That's why I like the idea of contractual snap-back provisions, that way there's no air gap or grey area. Otherwise making a job change can be nerve-wracking for a few weeks... don't do any recreational activities that might break bones after you resign, and drive carefully.