(Disclaimer: the online version is developed by a friend of mine. Not the original physical game of course, which is the best-selling game by Donald X. Vaccarino.)
The games themselves go pretty fast, and there's enough expansions that every game shouldn't devolve into a solved format. (I say this as a casual player learning the new expansions). You get access to the base game for free, and the pricing model for the expansions is pretty fair in my opinion (~$5/month for all thirteen, ~$2.50/month for half). There's a matchmaker and custom games. Even bots for those who want to play solo.
The site had some stability issues when user numbers spiked a couple of weeks ago, but he says he can scale more easily now and isn't afraid if everybody on HN comes to check it out.
Looks like a rough game. Why did you buy the last Cellar to end the game when you were behind?