Nobody seems to be enthusiastic about the three-city proposal. Those who are cautiously interested appear to be so for two reasons: 1) there may not be any appealing alternatives, and 2) it might generate more public (read: media) interest.
Why might there not be any appealing alternatives? Because it is expensive (a figure of $500K was used) to put on the Olympic Trials marathon. Why might a three-city proposal generate more media interest? Because the media have some interest in/awareness of the proposed big 3 marathons already anyway.
Given the fact that, from the point of view of most (if not all) runners, the single-day format is preferred, wouldn't it be better to work towards overcoming both of the problems listed above rather than essentially conceding defeat/irrelevance and leaving the single-day format?
How does one make it cheaper to run an Olympic Trials marathon? Combine it with an existing marathon. If it is combined with a marathon that features no appearance money for athletes and no prize money for foreigners, you can more or less safely assume that the entire front of the race will be made up of Trials qualifiers. This has the added bonus of giving not-quite-qualifiers a chance to shine and run with the qualifiers. For the women's race, it would be important to have a race that separates (or would be willing to separate) the men's and women's starts, but I suspect there would be quite a few marathons willing to do this if it meant being able to put on the OT marathon.
How does one increase media interest? Surely the current boom in marathoning should make this a lot easier. However much people on this board malign penguin marathoners, these are people who are interested in marathon running generally, know how far a marathon is, and have a sense of how hard it would be to run OT qualifiers.
Consider the following idea: USATF (or the organizing marathon, for that matter) hires a recent college grad who can write well to interview trials qualifiers and those trying to qualify. Polish up the articles, and distribute them for free to local running publications as well as the local news media in the months leading up to the trials. (Local meaning both local to where the race will be, but also local to individual runners.) Also see if qualifiers might write their own stories. I remember, from some years back, a story by Randy Accetta (I think) in RW/RT about his quest to qualify. Just putting on a great event is not enough to get people and media interested. Active outreach is crucial.
Similarly, for coverage of the race itself, USATF could/should spring for someone (or more than one person) experienced to do race commentary. Pay a good production company to edit the race video, and actively shop it around to ESPN, Fox Sports, etc.
Along those lines, how about producing a good DVD of the Birmingham and St. Louis races? Sell it on the USATF website; offer it to race organizers for free to hand out as age group awards at races; bundle it in the goodie bag of big city marathons -- whatever, there are lots of possibilities. Surely this would not be too expensive and could get a lot of people interested in the next race!
I don't know how many of these things have been tried in the past. But it seems to me that a lot more could be done in terms of active outreach on the part of the USATF, the organizers, and the runners alike, and it also seems to me that costs could be reduced dramatically if the race is simply coupled with an open race.
Maurits
Disclaimer: I have in the past run fast enough to meet the standards, but as a foreigner I am out anyway, so I have no personal interest in this issue other than to see an exciting trials race (or races), in whatever format.