This site has a nice layout, but is sort of confusing to navigate. They have bunches of content on DBZ (almost as much as me ^_^ LOL)

Layout: 9/10
Content: 7/10
Overall: 8/10

                
Nimbus Cloud:
The nimbus is a cloud primarily used in Dragonball. It was Goku's possesion and he used it to fly places. It could be summoned when you yell "flying nimbus" When Goku learned to use ki to fly he passed this possesion to Gohan. Gohan could already fly but he used the cloud to hide him when going to school (he didn't want people to notice that he could fly). Later Gohan gave it to his brother Goten.