Though that could just be a consequence of the lower importance local play has for the 3DS version. The combination of more prominent local play and transferrable unlocks should make custom moves more widely used on the Wii U version.
The 3DS FC sharing document is linked in
the first post of the PoTD thread. I'd expect something similar to be put up around the Wii U release as well.
While it's nice to have the option of getting it in November, I still won't be buying one until I can justify it a little; either if Smash destroys my original 3DS for good, or
something worthwhile is announced as an exclusive.