I have posted tactics for the first boss in Denova but here are links to possible interesting information about all the bosses and some videos of each boss kill.
http://mmo-mechanics.com/swtor/forums/Forum-Tier-2-Operations - Tactics forum for each boss and a video thread.
http://www.twitch.tv/ookini - Recordings from streams of PTR that I have been watching through. a lot of dead time and unrelevant info but gives a decent idea of what groups are wiping on and problem areas.
http://troopercommando.com/operations/ - I used this site a lot for EV and Karagga's and while there is no guides there yet they should be there soon.
Storymode
Toth and Zorn
[YOUTUBEHD]tKcijlwuZ3Y[/YOUTUBEHD]
Stormcaller and Firebrand
[YOUTUBEHD]uLPRzt2jPGY[/YOUTUBEHD]
Colonel Vorgath
[YOUTUBEHD]8HpDbVPuHgQ[/YOUTUBEHD]
Warlord Kephess
[YOUTUBEHD]tUc_P1f_8rY[/YOUTUBEHD]