Nice. Very nice.
As long as they keep the online extended-reality component running, I think I'll be satisfied.
"Extended-reality?" You ask?
Why yes! You see, the big war with Skynet now apparently starts in 2011, and there's this company called EniTech Labs that's developed a tachyon camera - a camera that is able to take pictures of tachyons (particles that travel faster than light, in theory backwards through time), but for unknown (still being researched) reasons, pictures it takes are of the location 1193 days in the future. Guess what? That's mid April, 2011. They've revealed a picture they took of San Francisco compared to a regular camera, and it appears to be devastated.
Disaster, rubble, chaos, oh my!
There's a Facebook group for ex-Cyberdyne employees (and EniTech staff). There's also the main website Takebackthefuture.com, which shows an eerily glowing red Terminator eye, which when clicked, shows the spread of cyborg to human over the period after the nukes hit (and a countdown to - guess what? The day the nukes hit, about 1191 days from the airing of The Sarah Connor Chronicles :P.

There's more to the story in the show, so I'll stick it in the cut for spoilers.

Supposedly, the show continues the Terminator timeline without recognizing Terminator 3.

It begins shortly after the events of Terminator 2, with John back in school, and Sarah having met a man and fallen in love. Sarah still has nightmares. And we soon find that there's another T-800 model who was sent back to kill John, again. A side note - I must say the FX for the tv show are decent compared to the first Terminator movie, especially in regards to the makeup quality for the new Terminator. So, the new T is able to locate John in his school, and posing as a teacher, gets into the class, begins the attendance check by name, until he comes to John. Of course, on raising his hand, the T basically gets up, draws a gun (from inside his leg, mind you) and begins his rampage as John quickly dodges sudden death and leaps out the window. A friend of his takes a couple of bullets for him, chaos erupts in the parking lot, his mother sees a live news report of gunfire at the school and rushes out to save the day. A truck mows down the T just as he's about to complete his mission and kill John, and we see John's friend Cameron - the one who took a few bullets for him - driving. She's another Terminator (another model 800?) but sent to protect him.

What's interesting about Cameron is that she shows a lot of emotion, and she seems made to integrate into human life, disguised as a human (as usual), but much more inconspicuous. It also feels that her mission now includes protection of herself - that is, unlike previous terminators, she won't get into a fight and do all she can to destroy the other while giving john & co time to get away, even if it means sacrificing herself. She'll recognize that the better choice is to save all of them including herself, and live to defend another day. This is implied by the theme made in comments throughout the show, that no one is ever safe.

A convenient plot element they've added is that Skynet has still been created, but in the future they still don't know by whom (perhaps Skynet's way to making sure no one could go back and stop Skynet from being made) - but they do know where and when. Thus the series' timeline and goal - get to whoever makes Skynet and stop it. Again.
What I like that they've recognized and used, is that traveling back for forward through time only allows flesh (or whatever's in flesh? since T-800's can still transport), so we soon find out that the good guys sent an engineer back to pre-1999 to build some high tech equipment, including a time bubble transport machine, using existing technology, inside a bank vault. Cameron was programmed with this info so that she's able to take them out of 1999 and bring them to 2007, where they can essentially 'start fresh', where no one knows where they are, where they take the war back to Skynet.

End premiere part 1. Part 2 airs tonight, and Mondays are its regular time slot.
Honestly, I'm as interested in where they're taking EniTech as I am in the TV show.

Along with shows like Heroes, The Office, Jericho, Lost... I think Extended Realities (offshoots of ARGs) are here to stay, and when done successfully, really do help extend a TV show's experience. They shouldn't be done strictly as promotional advertising, they should be treated as part of the creative production of the TV series. Break it out of the tv tube. (that is, of course, if it's feasible given the context of the story; but hey, if Terminator can do it...:)