In many cases peer reviewed materials are still the way to look at research. Students and teachers alike need to look at internet materials carefully to make sure there is a factual basis to their conclusions.
In his book Wikinomics: How Mass Collaboration Changes Everything Don Tapscott has a whole chapter on how Web 2.0 and science - the chapter is titled "The New Alexandrians Sharing for Science and Science of Sharing". He mentions OpenWetWare which is an effort to promote the sharing of information, know-how, and wisdom among researchers and groups who are working in biology & biological engineering among others. Interesting read.