As everyone noticed, the French Senate released the report about anti-doping while the Clinic was switched off. It is here:
http://www.senat.fr/rap/r12-782-2/r12-782-21.pdf
There are lots of useful links and stuff over at velorooms:
http://velorooms.com/index.php?topic=2718.0
From the data we can see that in 1998 all stage winners were tested, 14 (or 15) of those who came second on the stages were tested, and 11 of those taking third. The other tests seems to have been random, or maybe they were some kind of targeted testing. Jersey holders were not tested, except on the last stage (and then the winner of the green jersey was not tested) and a few other times, which might have been random.
While everybody else were very interested in the Festina team in 98 UCI didn't test any of the Festina riders after the stages. Festina was sent home after a week, and they didn't win any stages, but still. The other team which early on in the tour got lots of unwanted interest from the press for doping was TVM. UCI did test one of them (Blijlevens won a stage) before the news broke that one of their cars had been stopped by French customs earlier that year, loaded with doping products. No TVM riders were tested after that news broke on the day of the eight stage. If UCI was targeting their testing it seems it was to avoid catching anyone.
Apart from the UCI; Erik Zabel, Bo Hamburger, Stuart O'Grady and Jan Ullrich deserves extra mention. Zabel and Hamburger for their silly prior "confessions", O'Grady for his silly current "confession", and Jan Ullrich for testing positive even on Champs-Élysées. Congratulations to you all.