FoodInnovation.com has collected a range of studies regarding the health benefits of resistant starch, which you can find below.

M.G. Sajilata, Rekha S. Singhal, and Pushpa R. Kulkarni.  Resistant Starch: A Review. Comprehensive Reviews in Food Science and Food Safety.  2006; 5: 1-17.

The concept of resistant starch (RS) has evoked new interest in the bioavailability of starch and in its use as a source of dietary fiber, particularly in adults. RS is now considered to provide functional properties and find applications in a variety of foods. Types of RS, factors influencing their formation, consequence of such formation, their methods of preparation, their methods of estimation, and health benefits have been briefly discussed in this review.

Toden S, Bird AR, Topping DL, Conlon MA.  Resistant starch prevents colonic DNA damage induced by high dietary cooked red meat or casein in rats.  Cancer Biol Ther. 2006 Mar;5(3):267-72.

Addition of RS2 high amylose corn resistant starch (RS) to the diet abolished the increase in DNA damage and the loss of colonic mucus thickness induced by high casein and high cooked red meat diets. Because DNA damage is an early step in the initiation of cancer, these findings suggest that increased DNA damage due to high dietary protein as cooked red meat or casein could increase colorectal cancer risk but inclusion of resistant starch in the diet could significantly reduce that risk.

Zhou J, Hegsted M, McCutcheon KL, Keenan MJ, Xi X, Raggio AM, Martin RJ. Peptide YY and Proglucagon mRNA Expression Patterns and Regulation in the Gut.  Obesity (Silver Spring). 2006 Apr;14(4):683-9.

Peptide YY (PYY) and proglucagon (the gene that encodes glucagon-like peptide-1) were measured in epithelial cells collected from the colon of rats fed either a normal diet or a RS2 high amylose corn resistant starch diet for 4 weeks.  The gene expression patterns for PYY and proglucagon were up-regulated in the cecum and colon in resistant-starch-fed rats.  Butyrate increased PYY and proglucagon gene expression in a dose-dependent manner in vitro. 

E. Agama-Acevedo, et. al. Chemical composition and starch digestibility of tortillas prepared with non-conventional commercial nixtamalized maize flours. Int J Food Sci Nutr. 2006 February-March;57(1):143-150.

P. Raghupathy, et. al. Amylase-Resistant Starch as Adjunct to Oral Rehydration Therapy in Children with Diarrhea. Journal of Pediatric Gastroenterology and Nutrition.  2006 April; 42:362-368

Moon Jeong Chang, Ph.D et. al.  Interactions of high amylose starch and deoxycholic acid on gut functions in rats.  Nutrition. 2006 Nov; 152-159.

Xiong Liu, Taro Kishida, Kiyoshi Ebihara. High Amylose Cornstarch Decreases Plasma Triacylglycerol Concentration, but not Plasma Cholesterol, in a Dose-Dependent Manner.  Journal of Food Science.  2006 June/July;71(5):379.

Hanan Gancz, Orly Niderman-Meyer, Meir Broza, Yechezkel Kashi, and Eyal Shimoni.  Adhesion of Vibrio cholerae to Granular Starches.  Applied and Environmental Microbiology 2005 Aug;71(8):4850-4855.

Jacobasch G, Dongowski G, Schmiedl D, Muller-Schmehl K.  Hydrothermal treatment of Novelose 330 results in high yield of resistant starch type 3 with beneficial prebiotic properties and decreased secondary bile acid formation in rats.  Br J Nutr. 2006 Jun;95(6):1063-74.

Behall KM, Scholfield DJ, Hallfrisch JG, Liljeberg-Elmstahl HG.   Consumption of both resistant starch and beta-glucan improves postprandial plasma glucose and insulin in women.  Diabetes Care. 2006 May;29(5):976-81.

Brighenti F, Benini L, Del Rio D, Casiraghi C, Pellegrini N, Scazzina F, Jenkins DJ, Vantini I.  Colonic fermentation of indigestible carbohydrates contributes to the second-meal effect.  Am J Clin Nutr. 2006 Apr;83(4):817-22.

Bauer-Marinovic M, Florian S, Muller-Schmehl K, Glatt H, Jacobasch G.  Dietary resistant starch type 3 prevents tumor induction by 1,2-dimethylhydrazine and alters proliferation, apoptosis and dedifferentiation in rat colon.  Carcinogenesis. 2006 Apr 20