There's Nurse Witch Komugi who takes a few episodes to do some otaku/internet meme jokes (alot of their more humorous jokes come from taking jabs at otaku culture tbh.)
There's also an internet/computer focused episode of theĀ Magical Girl Pretty Sammy OVA, complete with an evil anime Bill Gates
The manga Cyber Idol Mink is a cute little story about a girl who uses a computer program from the future to transform into an idol
Also, Shoujo Kesshou KokoLogical, is a manga that just recently ended in Nakayoshi. It features a girl who starts visiting the cyber world known as BOX and has to try and save it for some reason (I've only read it RAW) and can transform into various dance-themed costumes. I think it has alot of potential for a cute new franchise, but it ended kind of abruptly (which leads me to believe it wasn't popular with readers, so they had the manga-ka rush a finale) so it probably wont happen