[Darryl Shaw]

I don't have time to look into this at the moment as I'm redecorating my apartment but I did a quick search and turned up a few studies that might interest you -

Conjugated linoleic acid (CLA) versus saturated fats/cholesterol: their proportion in fatty and lean meats may affect the risk of developing colon cancer.

Conjugated Linoleic Acid and Disease Prevention: A Review of Current Knowledge.

Conjugated linoleic acid and oxidative behaviour in cancer cells.

High-fat dairy food and conjugated linoleic acid intakes in relation to colorectal cancer incidence in the Swedish Mammography Cohort.

Conjugated Linoleic Acid Supplementation Does Not Reduce Visceral Adipose Tissue in Middle-Aged Men Engaged in a Resistance-Training Program

Effect of conjugated linoleic acids from beef or industrial hydrogenation on growth and adipose tissue characteristics of rats.

Effects of cis-9, trans-11 and trans-10, cis-12 conjugated linoleic acid (CLA) isomers on immune function in healthy men.

Conjugated linoleic acid content of human plasma.

Lack of effect of dietary conjugated linoleic acids naturally incorporated into butter on the lipid profile and body composition of overweight and obese men.

You might also find something on this in The Macronutrient Report.