Let's talk about AX8 stuff other than 'when?' Until the manual is posted, I'll start with a couple thoughts based on the picture:
1). Fricken LOVE the amp control knobs with the green LED rings around them! Gonna be so much quicker to tweak stuff on the fly.
2). What's the deal with that SHIFT / LOCK button? Shift seems obvious (alternate functions as labeled). Lock has a double down-arrow.. does it mean you double click that button and all buttons and knobs safety lock? So you can't accidentally mess up your settings?
3). From FX8 experience, that handlebar thing can get in the way when you try to step on the switches closest to it, but on FX8 it's only an issue with one switch (the top center one). This AX8 bar is longer, so switches 6, 7 and 8 will be less foot friendly. I'd probably try to assign those 3 to less-often used functions.. any other ideas? Maybe it's just me, but especially since I sing a lot while playing I often step down the tip of my toe ON the bar and miss the switch.