There are at least three bands called Ohm, one from Stockholm, Sweden and another from South Africa and lastly Chris Poland's Ohm: from L.A california. Ohm: is a Chris Poland (a former member of Megadeth who has also worked with Lamb Of God) experimental jazz fusion project formed by Robertino Pagliari and himself. The band was formed in 2002 and has released 3 LPs and a live album up to date. It should be noted however, that ohm is incorrectly tagged on last.fm... the true title of Ohm: includes a colon, according to Chris Poland this is due to their constantly changing drummers.
http://www.facebook.com/scalethesummitband Scale the Summit is an American progressive metal band based out of Houston, Texas. It formed in 2004 and signed to Prosthetic Records. The band draws influences from other progressive acts such as Cynic and Dream Theater. However, unlike most other progressive metal bands, they have no vocalist and play solely instrumental music. In 2004, Guitarists Chris Letchford and Travis Levrier moved to Los Angeles to attend the Musicians Institute where they met drummer Pat Skeffington.
Fusionmetal - A relatively new and unexplored genre in the world of metal. Exivious isn't an over the top math metal band and certainly isn't a loungy jazz combo either. But expect everything in between! With a jazzfusion backbone Exivious uses freaky metal riffs to decorate their organic eruption of free improvisations and complex rhythms. Guitarist Tymon comments: "We finally managed to transform a vision I had a long time ago into 9 intense and fiery songs. There's an immense amount of information in there that will definitely take more than one spin in your CD player to comprehend!"