Reflections on social networking to enhance learning

Even though I've just scratched the surface of social networking tools (like Twitter, RSS, Nings, Delicious, and LibraryThing by joining them & briefly learning about them in "short-hand", I know they all have potencial for me to enhance my professioal effectiveness and efficientcy. Using tools like I can network with other librarians, sugggest applications for teachers to integrate into their assignments ( & share tagged sites), and guide students in the use of of these tools for online collaborations for assignments--not just chatting.