He speaks! I like the audioblog here Trev. Keep them going!
I think having the three separate sections in one blog is just fine since it is how your text blog is set up. Also, they are short enough that it should not be that great of an issue. If you get to longer audio (like my rambling rants or the TrevReport) you may want to split them up.
One suggestion: I'm going to assume your core audience is english speaking so maybe do the english version then the japanese followed by the kanji? Just a thought. Who knows, there may be a huge cult of japanese readers out there that I don't know of!