Chibi Miku-san is a webcomic… About ‘Little Miss Miku’.
(Note: the large cluster at the top of the page is the comic I’m talking about. The rest is other stuff by the same artist.)
All the other Vocaloids are characters in the strip as well. Even fan-made ones.
It is a 4koma comic, which basically means a comic with four panels. And it’s in Japanese, but there’s little dialogue. So even people who don’t know Japanese can (usually) understand what’s going on.
Somebody animated a few of the strips, which is pretty cool:
FTL: (It won’t let me link to the individual images, so go down to #75.) Poor Neru.
Also, that archive only gets updated every ten strips. So it doesn’t always have the latest strips. For them, you have to go to the main index page. There’s a new strip almost daily, so you might wanna go there often. (Or, simply check the archive page every couple weeks for the block of ten.)