I'm going to fill this in (please feel free to contribute whatever you want to this thread - I'll edit any info in to the original post!) with details on PvE dailies at 50 and how they can get you geared up.
I'll only put one thing here now. There are PvE dailies on Ilum (requires the Ilum quest chain to be done) as well as Belsavis (requires the Belsavis bonus series to be complete). You can get ~25 daily comms a day. For 120 comms you can get raid level ear and implant pieces. For 8 comms you can get purple 50 mods.
I know people seem to be defaulting to PvP as the only gear progression (and some are saying there is nothing to do other than PvP dailies) but the truth is there's some great stuff you can get with al ittle work via PvE dailies as well.