The men's 5000 with the top 5 from Ethiopia (including Kenenisa Bekele in his first race in 28 days) and the top 4 from Kenya seems to be the highlight for true LRC people.
http://www.letsrun.com/2012/paris-0705.php
Elijah Greer is in the 800. Two really good steeples and Maryam Jamal in her seasonal debut in the 1500 as well.
And of course, Gay, Powell and Gatlin in the 100m.