Not yet, but TheFl0w (the guy from Vitamin and VitaShell) found a way to get access to the PSP emulator that comes with the Vita.
He told this way one of the programmers from ARK (a cfw for this PSP emulator) and he works on a port for HENkaku with this new way form TheFl0w.
In short: Not yet, but we will have it in the very near future. I will be really disappointed if it takes longer then 2 weeks. Stay tuned