Rippetoe is the king of squat/deadlift form.
Here ya go:
http://startingstrength.wikia.com/wiki/Video
Keeping ego in check is a good idea. I got up to doing 315 lbs with the deads too fast. I think my form was good, but my body just didn't like them. No biggie, I can do other stuff that will hit the same area, but deads are just too much more satisfying.
And yes, the bar weighs 45 lbs.