OK guys...I just want to clear up a few misconceptions that have been stated here. I have a close friend at Mesa, and here is the real "skinny" on what's going on with the Fathom:
There is currently "no" lawsuit with respect to the name Fathom...however, Mesa was contacted by the other company mentioned previously, regarding the use of the name "Fathom". In order to avoid any issues, problems, or just general hassles that could come up legally, Mesa decided to just rename the product.
The new name will be "M6 Carbine", and should be officially announced within the next few days. This information has been distributed to the sales group at Mesa and a new ad and website update will be out soon.
As far as having a warehouse full of "Fathom's" that will need to be disassembled and have a new faceplate put on, Mesa is building the M6 Carbine "to order"...there is no warehouse full of Fathom labeled amps...Mesa is a high end amp manufacturer, and does not mass produce their stuff like that.
I hope this clears the air a little...BTW, I have one here to test out, and so far my impressions are "holy cow this thing is loud for a 600 watt head!"...and I love the simplicity, the two-space rack size, and the lower weight. I'm going to gig it this weekend