Here's the original thread: http://flyertalk.com/forum/showthread.php?t=568619. And here's a recap of the program:

Customers on published fare tickets between the US and Hawaii are eligible for the "Rev-up" program. This applies to Continental-operated flights to/from Honolulu (HNL) and Maui (OGG). The upgrade cost for Elites (on any published fare) and customers on full-Y fares is a flat $275-$325 one way. For everyone else on a published fare, it's $350-$450 one way. Here are the details:

1. The cost. For LAX to/from HNL and OGG, the upgrade is $275 for Elites and full-Y customers and $325 for everyone else on a published fare; For IAH and EWR to/from HNL and OGG, the upgrade is $350 for Elites and full-Y customers and $450 for everyone else on a published fare.

2. How to confirm it. Elites and full-Y customers may confirm this upgrade 24 hours in advance through CO Reservations or at the airport; All other customers on published fares may confirm the upgrade within two hours of departure, and can do so only at the airport. Travel agents are not able to process these requests.

2. Other important restrictions. It's only valid on flights operated by CO, it's subject to availability (Z class must be available) and waitlisting is not permitted. It's not valid for use with free coach awards, unpublished fares, industry discount rates, unticketed reservations and ER1149/ER1181 tickets (for those of you that don't know what those are - they are free tickets donated by Continental to charities, sponsorships, travel agencies, etc.).

If you every encounter an agent that is unfamiliar with this program, simply have them refer to GG REVUP for more details.