Here's what Trudi's website has to say.

Hosta - wintersown.org

I sowed over 200 seeds from a variety of hosta including many from trades. So far, all of mine seem to be green or various shades. None seem to be truly variegated. So I think it has to do with how they are pollinated. If you can cross pollinate variegated hosta only, you might have better luck. Get a brush, collect pollen from one flower and spread it to others. Maybe someone else can tell us if hosta plants can self pollinate.

carmin----you might want to ask this question over in the hosta forum or do a search regarding your query.
Duane

I know this isn't exactly what you meant, but I have seed OP from sea octopus and you can already tell the leaf will be thin and wavy. As for the rest no obvious variegation although definitely some color differences.