Hi,

The advantages of Web2.0 technologies are as follows.

# Reduction of cost.
# Flexibility, as far as the posibility of choosing technologies is concerned.
# Easier and faster access to information, When and where it is needed.
# The integration of a varity of technologies in the teaching-learning activities.

Where disadvantages are

# it leads to a low quality of the actual content.
# it promotes amateurishness by invaluable contents generated by users.
# it gives everyone the oppurtinity to complain, thus creating a community without rules.