Not really. Jon-boy will appoint his replacement in the Senate. That will give him two years to serve and then he/she will run as an incumbant.
NJ voters are soooo stupid.
When vacancies happen in the representation of any State in the Senate, the executive authority of such State shall issue writs of election to fill such vacancies: Provided, That the legislature of any State may empower the executive thereof to make temporary appointments until the people fill the vacancies by election as the legislature may direct.
-- Amendment XVII, paragraph 2
Now there is an election of U.S. Representatives in 2006; in most states, that counts as a "statewide election" to be used for filling the Senate seat.