According to their website, PRTC is going to buy 11 more Advantages (#278-288) on top of the previous #273-277 group (yes, it goes up to #277 at this time). They also said that the some of the advantages from 2004-2005 are now in storage along with the Orion Vs. These buses are said to be retired by 2014 latest, so I guess PRTC don't have to follow the 12 year bus service-life rule.
Also, PRTC is apparently building a new depot on the west side of county. Not sure if it is a second depot or a replacement.
This bus order should rap up with #292 if all 18 units are to arrive.
Just an over due update, the order has ended with #288. #289 to #292 will probably be 2014-2015 buses.