My wife's Prestige Pack arrived this morning, and there are no upgrade certificates that I can see. The welcome letter is again included, and it says:
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">The Prestige Pack includes exciting offers from Continental and OnePass Travel partners:
- Six One-Segment Continental Space-Available Upgrades, valid with any published adult fare
- One $99 Companion Ticket certificate
- Two complimentary visits to a Presidents Club location for you and a guest
- Hotel upgrades, car rental discounts and more
</font>
So it doesn't look like the offer was changed. I'll have her call and ask why the upgrade certs weren't included...