Bioware recently (last Friday) release more information on the Jedi Knight class. They have added more about advanced classes for the Jedi Knight and a little information on the Jedi Knights first companion. The T7-01 droid which has not had its memory wiped for a long time. This little droid T7-01 has just about everything that is great about droids including computer and repair skills but over the long time it has served with the Jedi the T7-01 has picked up many skills that come into play on the battlefield making him the idea companion for a Jedi Knight.
Lets take a look at the two advanced classes of the Swtor Jedi Knight:
Guardian
The Jedi Knight Guardian sounds like a tank since they can wear heavy armour and have skills to empower their allies on the battlefield. Using his lightsaber the force and heavy armour can make killing a Jedi Knight Guardian a very hard task. They are known as leaders on the battlefield and have the defense to withstand many hard attacks. If you are wanting to play a tanking role for the Republic then this may be the class for you.
Sentinel
The Jedi Knight Sentinel has training with two lightsabers and can use them to chain together massive combos to inflict huge damage on there enemies. Looking for weak spots on their target and hitting them with deadly accuracy is what the Jedi Knight Sentinel is all about. This class reminds me of a common class in mmorpgs the Berzerker. Basically a bit like a glass cannon. Although the Jedi Knight Sentinel may not have the defense and support skills of its Guardian counterpart its damage will be a massive amount better.
Check out this new video to see the Jedi Knight in action