Random research question

How many anime can people think of that directly feature cell phones/the Internet/online social networking in the plot? I'm interested in writing a post about the portrayal of these items in anime, and how that portrayal has evolved from the infancy of the 'net to today. (Though I'm trying to keep my post has narrow as possible, because I don't want to drive myself insane, haha.)

As long as these things figure into the plot in more than an incidental way (i.e. if two random background characters speak on cell phones in Honey and Clover, I don't need to know that :p), then feel free to mention them. Ask me any questions if you want me to clarify, as well.

The list of anime so far:

-- Summer Wars (need to see this)
-- Serial Experiments Lain
-- Ghost in the Shell (even though the only one I've seen is Stand Alone Complex, haha)
-- the .hack anime
-- Voices of a Distant Star
-- Cowboy Bebop
-- Real Drive
-- Kuuchuu Buranko
-- Kimi ni Todoke
-- Durarara!!
-- Eden of the East
-- Death Note
-- ef - a tale of memories/melodies
-- Perfect Blue
-- Lucky Star
-- Pokemon
-- Dennou Coil
-- Paranoia Agent
-- Chaos;Head
-- Welcome to the NHK
-- Chobits
-- Battle Programmer Shirase

Anything more would be appreciated!

EDIT: You all are coming up with great examples! I might even have to put off this post for a while so that I can do a bit more "research" into the subject! xD

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