Google even more!

To be honest, Google applications provide more convenient tools for the users, but I don't see educational chances of using them. It will be nice to introduce those applications to the students. Students can use those applications for their own purposes since those are designed user-friendly. But I don't feel it is necessary to teach ELL students how to use those tools. I'm also concerning that the services come from one certain company. I can recommend ELL students to customize their portal homepage in order to grasp more reading chances based on their own interests. I can also encourage students to upload their works to Knol to share the information.

Wikis

It is interesting that wiki has two sides of advantage and disadvantage within one character-collaboration. Wiki is a good tool for quick collaboration, but it does not guarantee the accuracy of information because it is edited by anonymous.
On the other hand, I liked PB Wiki. I like the improved tools for controlling distributions. It is managed by certain groups of people who are officilly invited to the group. PB Wiki might be used for 2nd language learning as an on-line activity in reading and writing.
Many teachers/faculty "ban" Wikipedia as a source for student research. I basically agree with them. The information which has uncertain features should not be used for academic purposes, but I would allow students to look it up as an unofficial source. As Wikipedia is a work of collaboration, it must have included some useful information in it even though "determination of values" is an our job.