we're going to make it for iOS (just submitted the iPad version today--will hopefully submit for iPhone/iPod before the week is out) and Android devices, so iTunes and the Android Marketplace. We are also looking at putting it on Amazon.com if we can--we're also highly interested in putting it on the Kindle Fire, so that may end up happening.
Depending on how difficult it is to port to other devices supported, we may end up working on the others. We found that it was too difficult to deal with App Up, and being that there is already a single-player Pinochle game online, we didn't feel it was worth the effort trying to compete with them.
We REALLY want to put it up as an HTML app in order to plug it in as a facebook app, so we are eagerly awaiting the next release of AppGameKit for that--as well as Blackberry. We haven't seen too much in the way of MeeGo or Bada out here, so unless there is a groundswell of support, we'll probably pass on those two.
Lastly, the bid dream: If the game does reasonably well (which it might, Pinochle is surprisingly popular, and not very well represented in any of these marketplaces), I want to make a run at figuring out how to put it up on xbox live arcade. We'll need a publisher to do it, but I already have one that is somewhat interested--they just want to wait and see how it does on the mobile devices first *crossing fingers*.
This isn't the last version, either. This is just the one to get us started--we have big ideas for this game!
Sorry, that spiel went longer than I expected!