Well, it now appears that Terminator: Salavation wasn't the last Terminator flick. Hanover House and Red Bear Entertainment are teaming up to produce Terminator 3000, although it's unsure when this movie will fit in (if at all) to the Terminator mythos. They do appear to basing it off characters and storylines ini Terminator, but no plot points have come out yet. A few things have, though.
1) The budget is reportedly 70 Million (far less than many other Terminator films)
2) The movie will be PG-13, toning down the violence a bit.
Pacificor, LLC now owns the rights to Termninator, and production looks to begin as soon as January of 2011. No plot points or cast members have yet to be announced.