Huke's Comiket 77 release was Black Rock Shooter Visual Works 2, and similar to the first volume, its content consists of the characters that make up the BRS world. There is a great focus on the villains in this volume, and impressively, none of the Black Rock Shooter illustrations that appeared in Huke's PICSIX are in this book, so there is no overlap.
Miwa Shirow's VVW Vocaloid Visual Works is awesome and you should buy it. This concludes my review.
YahaKo's full color doujinshi RE:UNION released during the Vocaloid Master 9 (ボーマス9), brings you Hatsune Miku and the other Vocaloids like you've never seen them before: as bad-ass gun-toting idols. With the success of Black Rock Shooter, it almost makes you wonder why so many artists try to keep the characters looking cute!
I bought Shigunyan Art Works 2003-2007 during Comiket 76, even though it had been out for a year at that point. And I'd almost passed it up too, because for some reason the online shops like Toranoana and Melonbooks were only highlighting the very ecchi and adult pictures in it. But, there's a lot more to it than that!
COLORS is a Vocaloid fan book that came out during the Vocaloid Master 9 (ボーマス9) from the circle Ritornello, whose main artist is Mitosa (みとさ). You can check out her (or his, I never know this kind of thing ^^;) art work on Pixiv as well.
Mixture, produced by Kaori Minakami (水上カオリ) is a gorgeous collection of Vocaloid illustrations inspired by the Vocaloid original songs themselves. This doujinshi was released during Comiket 76, is 24 pages long and entirely in color.
Momose Hisashi's Rio Miku is a collection of illustrations of (you guessed it) Hatsune Miku and Rio de Channel that span a few years for this artist. Though more familiarly known as Momo, I kept the artist's actual name for the category because it's a lot easier to search for than just "Momo."