Both albums are by The 39's, a group that performed for Mikunopolis in Los Angeles and 39's Givings Day. Features acoustic remixes of Vocaloid songs. The first CD contains Vocaloid vocals and the second contains covers by utaites. The two CDs release on 11/30 for 2,500 yen. The cover art is different than the previous versions of Acomiku and contains new tracks.

Crossfade

Acomiku with VOCALOIDS Tracklist
1.magnet / mianto(RyuuseiP)
2.Saihate / Kobayashi Onyx
3.Hello/How Are You / Nanou
4.Kimi no Te, Boku no Te / 40mP
5.Toeto / Toraboruta
6.Scissorhands / Nem
7.Super Nova / Fullkawa Honpo
8.Hajimete no Oto / malo
9.Double Lariat / Agoaniki
10.Chocolate Train / PENGUINS PROJECT
11.Fushigi Zukkin / Abe Jun
12.ARiA / TokuP

Acomiku with VOCALISTS Tracklist
1.magnet / Wotamin & Kakichoko
2.Saihate / Milia
3.Hello/How Are You / Wotamin
4.Kimi no Te, Boku no Te / Nazo no JinbutsuK
5.Toeto / Chata
6.Scissorhands / Hanycham
7.Super Nova /Madoka Ueno
8.Hajimete no Oto / Madoka Ueno
9.Double Lariat / Lon
10.Chocolate Train / Lon
11.Fushigi Zukkin / Hanycham
12.ARiA / Kakichocho

You can see the cover art and other info here at NND's news blog

This is a major release, so it's available at most international stores. Here is a few examples
Acomikus with Vocaloids: CDJ | HMV | YA
Acomikus with Vocalists: CDJ | HMV | YA

EDIT: Acomikus with Vocalists release date has a been moved to 3/07