As you probably know, I've done the switch from WP.
You may want to stay with WorldClubs or sign on again with them, as there may be a bonus with WClubs and not PClub. Reciprocity is virtually seamless (unlike the fflyer programs). I know that WClubs did have a 2.5k sign on through 12/31 and PClub, nothing. May want to double check.
Go for the Executive or Prestige Pack. OP gave it to my wife although her account was dormant since 94 as well. Otherwise, start afresh.
Chase has the perennial 4k/6k reg/plat card offer.
MCI 25k for CO. See MCI thread.