That double XP can be stretched even further with boosts and the like, for the record. A post on Reddit outlines exactly how much experience you can be getting if you make your boosts work together via multiplication, topping out at a 429% bonus. Save up some boosters over the next couple of days if you haven’t already, and get ready for leveling over the weekend.[Source: OotiniCast; Thanks to Jake for the tip!]
Star Wars: The Old Republic is hosting a double XP even for the duration of the convention, from April 16th until April 19th. It’s not quite the same thing, but you can still be up to your eyeballs in Star Wars while it’s going.