<i>Even better, continental have just upgraded the newark service to the 777 three times weekly, to add to the 764 for the rest of the week!</i>
not entirely true. Due to the SARS crisis, demand for travel to the pacific (specifically hong kong and china) has plummeted. These routes were operated by 777 aircraft. Due to low demand these routes have been dropped or had frequency reduced.
As the airline now has a lot of 777 aircraft lying around, CO have decided to put them to use on popular routes, such as GLA.
A minor point, but just be warned that once SARS goes away and demand picks up on the pacific routes, the GLA flight will be back to 767-400's.
Therefore GLA has not been upgraded to 777, the aircraft is just offering a temporary capacity upgrade.