Lots of discussion on canards on the kite forums. Zeeko is the main brand pursuing this. There are a few others too, but in the 5 years or so since zeeko introduced the spitfire, it hasn't caught on widely.
The benefits seem sensible: with two lifting wings, you can get the same lift from smaller wings; the tendency on a surface breach is for the foil to settle back slowly, so less wipeouts after a breach; turns are initiated off the back foot, like a surfboard carve, so it feels more surfey.
I tried it on my kite foil with some DIY wings. Quite an interesting feeling to stomp a turn, rather than steering through it on a normal foil. However, mine wasn't tuned quite right, took a lot of effort not to drop off foil, so I went back to my "normal" set up.
Zeeko is making increasingly larger wings for their spitfire canard. First the XLW (extra large wing) for kite cruising, and just recently the XXLW for sup foil. There are some videos online of their designer riding them. They appear to work, though the videos aren't really "holy crap, that's insane, I must have those!", at least not yet.