Some physical Yomi beta decks are available right now in small quantity. The print-and-play versions of those same characters are also available at that same link. This is a small, print-on-demand run so note that the cardstock is different from other Yomi cards, but it's still fine. These decks have all the real art and are in a polished state of balance. If any balance changes happen later on, the good news is that it's easy to make just the changed cards available because of the print-on-demand nature of this run.
The expansion characters available right now are Quince, Onimaru, BBB, and Troq. Also, there are updated versions of Grave, Jaina, Midori, and Setsuki available. All characters have cooler looking character cards now, a new stat summary card, and all abilities now have a timing tag like "draw phase" that lets you quickly see when the ability can trigger.
All these characters are also playable free online. If you'd like to learn more about the new characters, here are some articles by Thelo (programmer Yomi online):
Keep in mind that you get free shipping within the US on any order over $25 at sirlingames.com. So you can get just one deck, but if you combine that with some other items then you'll be able to reach the free shipping threshold. Enjoy the new decks!