Well, my Bounty Hunter is level 50. I finished it off by heading to Corellia and finishing a couple of quests as well as one of the Heroic quests. I then headed back up to the fleet and ran a couple of Warzones to hit the cap. Now what? I am max level and have all of my professions maxed out. I am not incredibly interested in dealing with the Galactic Market until there is actually a market. It seems to me that most things just do not sell.
I have tried to sell all kinds of gear with no success. At least you get your deposit back if it does not sell.
I played on my Sith Warrior a little bit as well and got him to level 13. I will be glad when he gets sprint. Running is just so damn slow.
I will probably have to wait for more people to hit cap to do much in the way of flashpoints.