Don't apologise. It was a good episode.
No, not storywise anyway... think of the coming film as an alternate timeline with the first two Christopher Reeve films as the background.
I hope not. Smallvile is about Clark before Superman but it would be neat if he donned the costume in the Season 6 finale or something. Assuming nest season is the last of course... (it has to be, right? )
If it was cancelled we would have heard something earlier in the year. I'm guessing it will be a key show for The CW.
With regards to story it looks like the writers are wrapping it up so iit looks like we are near the end. I'm hoping that the other heroes we've seen over the years will feature in next season helping to quell the pandemonium. However I have a nasty feeling everything will be resloved wuickly so that the usual boring teen angst can take place.