Of interesting note to non-native speakers of Japanese; all of these songs feature simple, and I do mean extremely simple vocabulary and basic grammar. Anyone shooting for a JLPT4 should check out these songs. If you're not at ease with the words that you hear, you might consider working on your 日本語 skills a little bit more. Of course, this is directly related to the fact that most anime produced in that time period was destined specifically for children. Computer hacking and political conspiracies weren't exactly common themes back then.
EXTRA HYPER GAME MUSIC EVENT 2007