The author mentioned it somewhere in one of his interviews. "Yorozuya no Gin-chan" sounded plain to him, so he changed it to Gintama, which is nice since he can now make jokes about silver and golden balls. >D
I remember reading Gintama and my brain just left, after laughing around 30 minutes and even the anime's just as funny as well, while being serious and sad at the same time. And that's what I really like about Gintama: balancing out the story and the characters, as well as the action, drama and comedy. Shame about the selection of Shonen Jump series that I find them absolutely boring.
And has anyone read the Itou aka Shinsengumi Rebellion Arc, both in anime and manga form? I cried when Itou died not as some traitor, but as a surprisingly good-developed character and an irreplaceable Shinsengumi friend that will be forever remembered by the fans. ; __ ; (And before you ask, yes. I really like Itou and it IS going to be hard that I should move on and carry on watching/reading...)
XD At this rate in terms of Gintama referencing Kamen Rider... I think Rumbel Subs (fansubbing Gintama) needs some collaboration with TV-N's help.
Gintama is one of the best animes ever. Period. My sig speaks for itself. And if you look carefully, in episode 65, when Okita holds the beetle, isn't his pose reminiscent of Tendou's zector pose? Edit: Btw, Tomozaku Sugita voices Gin, and Akira Ishida voices Katsura. Kinda funny isn't it? Kivat and Tatsulot? Gintoki and Katsura?