I'll be honest: the form looks too artificial to me, and the examples I've seen to date barely function as wholesome, belly-full satisfying poems. But then again I write haiku despite despising the form, so what the heck ...
Sevenling (there are no rules)
There are no rules for those who wait.
she swallows the starling whole:
as it beats, the heart grates her chest.
Rules are made for breaking the hearts
of the little people. Watch the swallow:
a feathered boomerang curves across the sky.
When the angels called, she was not at home.
I'm sure future generations in search of my posterity will have fun close-reading that little gem!