Could very well be. Either way, the man obviously has awesome balance or another means of movement.
Well from the artwork we've seen so far I'd place my bets on sword-stilts. But yeah, I agree with your overall point.^^
Pretty much the same except the first is a verb. All flying or floating things. It's a total grab bag. If Oda wanted it to sound cutesy for someone so powerful (ie. Kuma) he could have gone with Fuwa Fuwa, or if he wanted it to just make sense he could have gone with Tobu Tobu.
I see. Well then I'd chose Tobu Tobu. For no other reason but the thought that it sounds most appealing to me.^^
JUMP also gave a tantalizing footnote about Vol. 0.
It's been confirmed that Vol. 0 WILL CONTAIN CHAPTER 0
However, the footnote claims, "…and additional material."
It was not specific as to whether that additional material was actual comic, or simply the promised sketches.
Said it before and I'll say it again. I'm quite sure that Volume 0 will contain Chapter 0 and the stuff from that art book. I hope that I'm wrong though and we'll get more story material. Unless of course chapter 0 is quite long (which I doubt considering that it's going to be featured in JUMP).