I think ideally, if strength is a high priority, you'd do track work first (because this should always be #1 priority), and then later in the day come back and lift heavy. This is better for recovery and enhances the athlete's hormonal profile. Testerone peaks 45 minutes into a work session. After this time, all anabolic hormonal production falls off dramatically. So essentially if you were to do two (or three :o) intense workouts split up over the course of the day you could get 2 or 3 natural anabolic hormonal surges. This benefit is in addition to the fact that regardless of what order you choose to do the weights and track work, if done in a single session, the second of the two will always suffer.
Having said that, it wouldn't work into too many people's schedules to do that. This is especially true of collegiate athletes. In a collegiate athlete such a program might cause more problems (additional time, transportation 2x to workout facility, time conflicts, etc.) than benefits.
ELITETRACK Founder