Do you mean conducting research on (say) student use of web 2.0 technologies, or employing these technologies in contexts where students are conducting research? (I do the latter, though I have some interest in the former.)
My research deals more with student use. Actually, when teachers use collaborative networks across time zones, how do students repond to Ethnocentrism (how students are centered on their own cultures and not aware of others). However, I'm interested in the students using 2.0 technologies to research as well. Would love to share thoughts.