Some of the useful references related to Ant Colony Optimization in NS-2 for Wired networks, Mobile Ad hoc Networks and Wireless sensor networks are given below:

http://www.idsia.ch/~gianni/antnet.html

http://antnet.wordpress.com/

http://www.springerlink.com/content/n6511860l57852n8/

http://comjnl.oxfordjournals.org/cgi/content/abstract/bxn007v2

http://www.actapress.com/PaperInfo.aspx?PaperID=30354&reason=500

http://uespro.blogfa.com/post-2.aspx

http://www.slideshare.net/guest4c60e4/ant-colony-algorithm

http://www.ingentaconnect.com/content/klu/tels/2001/00000018/F0030001/00352998

http://www.faqs.org/patents/app/20090052321

http://findarticles.com/p/articles/mi_m0VVT/is_2_2/ai_n24986963/

http://trg.fke.utm.my/members/kashif/ijcnis09.pdf

http://www2.computer.org/portal/web/csdl/doi/10.1109/SecTech.2008.49

http://www.q2s.ntnu.no/~wittner/ns/      (Mobile ANT Agents)

http://www.matlab.nitech.ac.jp/~khpoo/research/ant.htm

http://openpdf.com/ebook/anthocnet-coding-ns2-pdf-2.html

http://iridia.ulb.ac.be/~mdorigo/ACO/about.html   (Nice Website, quite informative!!!)

http://geneura.wordpress.com/category/algorithms/ant-colony-optimization-algorithms/

http://eden.dei.uc.pt/~tandre/antsense/    (Antsense: ACO in Wireless Sensor Networks)


Hope it helps.

Regards