Net Ghost Pipopa

Yuta Akigawa is an elementary school boy who has a problem with computers. He had a scary incident as a baby and has avoided computers and technology ever since. Then his family moves to a city run entirely by computers and has begin carrying a cellphone. One day, he opens a phone to read an email message and gets sucked him inside his mobile phone, and into "net space." There he meets three mysterious creatures named Pit, Pot, Pat — PiPoPa for short. The four new friends go on a series of adventures that takes them between the human world and the net world.

Series first aired in June '08.
Animation by Studio Hibari.

ANN is reporting that Crunchyroll has licensed this series (from TV Tokyo) to permit them to stream it on their web site in a subtitled format.