I am playing hybridiser a bit over the last xy years as well. My aim is to combine some of the colours of violet cultivars with the overall characteristics of the wild (species) plants. I don't have any varieties registered. My plants so far:
Paul's Wild Beginning: a cross which I use as the base for further hybridising. Standard, blue-violet dropper, rather similar to its parent S. intermedia, but it inherits both the genes for pink flowers and for star-shaped flowers from its other parent. (Pixie Pink x S. intermedia)
Paul's Wild Star: the logical offspring of Wild Beginning: a leggy small standard with light pink, star-shaped flowers. Dropper. (Self-pollinated Wild Beginning)
Paul's Fake Velutina: a mini or semi-mini which is similar to velutina Light (it's mother) but smaller and with blue-violet flowers with a dark centre. This plant is a dropper, but it sometimes retains flowers, which are over time bleaching in the light. Rather resistant to low temperatures on the window sill! (Wild Beginning x S. velutina light)
More coming in time, probably. My main interest is the maintenance of the species, hybridising is just for fun and out of curiosity

P.