The list of StH2k6 Vocal Traxx

Perhaps this is the first info about the list from the official side.
According to Jun Senoue's diary;

In his community of Mixi, at last he has written about the list of StH2k6's vocal tracks.
You already might've heard 1~4 in the game if you finished the stories.
But 5~7 are absolutely new for our ears because they are not contained in the game.

1. His World : Ali Tabatabaee & Matty Lewis from Zebrahead

2. Dreams Of An Absolution : LB

3. All Hail Shadow : Crush40

4. My Destiny : Donna DeLory

5. His World : ZEBRAHEAD
Played by ZEBRAHEAD.
Jun said it has been more up-tempo and aggressive than the original one.

6. DOAA LB vs. JS Remix : LB & Jun Senoue
DOAA's Jun Senoue version.

7. His World : Crush40
Jun said this is heavy and darker than the original...I love this very much.

The Vocal Trax is not a SEGAdirect exclusive merchandise, so we can buy it at a nearby CD shop.
Jun gave us a bunch of useful links:

Amazon
　 www.amazon.co.jp/dp/B000KF0TRO…
HMV
　 www.hmv.co.jp/product/detail/1…
TOWERRECORD
   www.towerrecords.co.jp/sitemap…
新星堂(Shinsei-do)
   www.shinseido.co.jp/cgi-bin/We…
すみや(Sumiya)
   mediamax.sumiya.co.jp/review.a…

They are Japanese shops, but you might be able to buy the CD at a shop in your country.
When you ask the CD, you may need them;

Title：SONIC THE HEDGEHOG Vocal Traxx "Several Wills"
Number：WWCE-31142 Release date：2007/1/10
Publisher, Selling agency：WAVEMASTER/AVEX
Price：￥2000

I hope you can get this Vocal Tracks soon.