Diedinhissuit is a two-man hardcore band, and they are crazy. They offer up two different tracks similar to Fire Horse Monarch and Gasp, but without samples or keyboards.
The Danglers are a great three person instrumental "jazz-core" band, with nice electric violin laid over drums and bass. They offer up one three-part song that I've split up into different tracks. Fans of Zappa's more simple jazz-style works might like this band a lot. This shit is highly recommended, yo!
1. You Can't Take It With You
2. When Mold Becomes A Mask
3. The Suite A: Short Attention Span Theater
4. The Suite B: Intermission Music
5. The Suite C: Mantra