I also just came back after a stint in late 2010. I was afraid the server would be too top-heavy and the exp scene barren, but I've been pleasantly surprised. There are plenty of genuinely new players and plenty of twinked alts who are open to grouping with the newbies.
Play at high-population hours, be willing to travel, and start groups yourself. You'll usually find some action. Send lots of tells and keep in mind you don't always need a full group - you can well in a duo or trio.
If you do need to solo you may want to consult this
guide.