Sure have - on vids. They look awesome, but Hobie dropped the hydrofoil concept craft. That doesn't surprise me, as they are notoriously difficult to handle. What you saw in that vid was
the best of the best. Given different wave/wind conditions, they can't cope.
Even the multi-multi million dollar record-breaking sailing hydro - l'Hydroptere
- has capsized.
Hobie is very innovative, but their business is still to produce reliable craft for a mass market. At this point in time at least, hydros just don't make it.
Can't help but wish, though!