Quote: BioWare is working on a second warzone besides Alderaan with another topography. Warzones will be larger than standard parties (at ltest 8 vs. 8). - SWTOR-Station
Quote: There will be "Open World PvP" in terms of meeting members of other factions on planets as Tatooine being able to decide if you want to attack them or not. -SWTOR-Station
Confirmed by Greg Zeschuk that there will be Open World PvP in appropriate areas within TOR - Interview
The designers from Warhammer are working on the PvP for TOR. - SWTOR-Station
While there is no Space Combat PvP at launch it, and Co-Op, will be added at a later date - PC Gamer
PvP can be fought in Warzones which are specific team-vs.-team scenarios - 1up
Warzones were presented as distinct zones that are separate from the persistent Alderaan world map. - Darth Hater
Quote: We’ve explored a lot of those endgame PvP mechanics and that is another area where I think people will be excited - VG247
Quote: Yes, we have anti-twink measures. Yes, high level players get shut out if they kill creatures too far below them. - XP Damion Schubert
Quote: We don’t support the high level character killing the low level player, but it’s safe to say that we’re going to make sure that that does not happen. - VG247
Quote from James Olhen: "We're going to have open world PvP, As for the more structured PvP, I can't going into details but we will have it" - PC Gamer UK April 2010
Small amount of PvP action shown between 3 players during Dev. Video (4.00) - Developer Video
Confirmed that you do NOT have to PvP in TOR, its an option if you want too - IGN
Richard Vogal during an interview said that Battlegrounds were available - Games Reactor
Loot sets also seem to be in game, possible mutliple PvP sets mentioned - Gamespot