Facebook is a popular social networking web site that also provides storage for photos.  Why not use a series of photos wiht captions to convey a vocabulary lesson?

That's what my colleague Steve McCrea does regularly wiht his students on his PHOTO ALBUM at "Steve McCrea" (his Facebook account).  You can access his work at this outside
link:
http://www.facebook.com/album.php?aid=80168&l=bfd10&id=585273766

He has similar photo albums on ORKUT.com
Look HERE.

For more about using Facebook in the classroom, look for his article here.