Thanks for the replies everybody! I'm going to reply in two posts, the first will address the salary points mentioned above and the second will address the remainder.
Everything you ever wanted to know about engineers salaries: A significant component of engineering salaries depends on the individual engineers experience level, the markets that they serve, the size of the company they work for & the relative strength of the economy of that market. As an example, assuming equivalent experience levels, a structural engineer in the oil and gas field would have a lower salary than say a petroleum engineer in the same field (because the petroleum engineer would be the project lead on any projects that both engineers would work on). Also in general, engineers in any field will have higher salaries when their field is growing rather than contracting or just keeping pace with the overall economy.
To further illustrate this point, Jack and I are both Civil Engineers and although we have different specialties, we are both considered unlicensed, intern engineers (only allowed to practice engineering under the supervision of a licensed professional engineer) at this point in our careers (Some engineers work in industries such as Aerospace or Manufacturing which have laws that allow them to practice engineering as unlicensed engineers as long as they only practice engineering within their specific company). Jack and I would generally expect to see a fairly significant increase to our overall salary as we become licensed professional engineers and began taking responsible charge of projects. Further, since we both serve the Construction industry which has been decimated by the recession of the past five years, we can probably expect better than average salary increases over the next five to ten years as the industry begins a meaningful recovery.
Also, generally, as the size of the company increases, so does the value of the salaries/benefits of the engineers that work for said company [although they will be more in tune to( & subject to the rules of supply/demand of) the market that their company serves]. Although I think this is a general rule of the overall economy and not only related to Engineering companies.