For everyone who is worried about this being a way to cheat, here are some things to think about:

• It only stores seeds that the player already has
• It doesn't give players seeds that they haven't already discovered or purchased
• It doesn't reveal any more information than what is already available from the many breeding charts and the forums
• It is being designed so that seeds can be stored and retrieved only by the player slot that created them. Trying to use them with a different game/player slot will delete the Virtual Seed Tray and it will be gone.
• It may actually encourage people to rely less on [other people's] breeding charts if they are not worried about losing seeds, which would actually reduce the amount of cheating that's already going on.

That's only my opinion, of course.