The Delta.com site displays both the fare, and the total all-in price, from the very first fare display page. Works well.

The Southwest.com site gives you a grid showing only the base fares but, once you select the fare, the next screen shows the all-in price. Not as good of an implementation at Delta but not bad.

I recently did a rental car through Travelocity and that got me a grid with all of the different car and company options showing but the base per-day change and total rental charge in each box of the grid. Worked well.

What I don't want to see is the taxes hidden. I think we should know how much of what we are paying is going to taxes and other government fees. This is especially true in travel expenses as the percentage of taxes and government fees can be so much higher than what we're used to at the checkout register.