Bingo Wings, great to find someone else who things Star Trek is way over rated and that T4 is taking an undue beating. I really liked Terminator Salvation. Even more so the second time I saw it than the first. I also really liked the idea of the original ending, and find the current ending incredibly weak.
I think there is a brilliant fan edit in this (good bye Bale!), I just really hope the originally intended ending is on the DVD. That ending would be a vast improvement.
I also didn't like Arnold cameo. It was kind of cool from a nostalgia perspective, but it just didn't quite look right. Looked like a video game character, obviously CG. I can imagine in a few years time he will look really dated and stick out like a sore thumb. I think they were going for dramatic affect in John running into the Terminator from his childhood.
I personally think the T-800 should have been left out, since Kyle describes them as a new model in the first film. If they had been around since the time he was a teenager, they aren't really that new (changing timelines explains this easily enough though, so not that big of a deal).