Harmonix, MTV Games, and Electronic Arts announced that tracks from Styx and REO Speedwagon have joined the Rock Band Music Store along with three tracks from Hautewerk. The 7-track Styx/REO Speedwagon pack goes for $10.99 (880 Microsoft Points for Xbox 360), while the 3-track Hautewerk pack is $5.49 (440 Microsoft Points for Xbox 360). The tracks are also available individually for $1.99 (160 Microsoft Points for Xbox 360). The packs are now available via Xbox Live Marketplace, while the PS3 versions arrive on Thursday as usual.