Here is a wonderful article written by Dana Ullman about Nobel Prize winner Luc Montagnier. It covers some of the research done, and information countering the skeptic's claim that there is no scientific research done confirming homeopathy:

Luc Montagnier, Nobel Prize Winner, Takes Homeopathy Seriously

Montagnier, who is also founder and president of the World Foundation for AIDS Research and Prevention, asserted, "I can't say that homeopathy is right in everything. What I can say now is that the high dilutions (used in homeopathy) are right. High dilutions of something are not nothing. They are water structures which mimic the original molecules."