I'm not reproducing the actual text of the e-mail here, because it's lengthy and I'm not sure that I entirely agree with it. I dislike the amount of control the oil companies have over the US. However, I'm not sure that organizing a boycott of gas companies based on market share is an answer that will do the society long-term good. Perhaps organizing a boycott of gas companies based on their willingess (or rather, lack thereof) to look to alternate fuels and their support of research in energy conservation and efficiency?
On a personal level, there are things that consumers can do to reduce their overall use of gasoline. Planning routine tasks for efficiency -- not taking separate trips to accomplish each trip, using alternate modes of transportation when possible (walk, bus, carpool), doing things in off-peak hours to avoid the nastiness of rush hour -- probably more.
I am very much encouraged by the article I saw some months ago about a method of breaking down garbage into its component parts, and extracting all number of useful substances from same. A good portion of the substances produced were oils, gasoline, and fertilizer. If we can't make the transition from a gasoline economy so quickly, perhaps we can at least move away from a fossil gasoline economy.