I have little concern buying a Chrysler. Most of the parts are from third parties anymore anyway so parts availability for almost any wear item is not a problem. Warranty repairs are the main concern, but I don't expect Chrysler to disappear. Someone will buy them and in almost all likelihood will honor past vehicle warranties. To do otherwise would be a PR disaster and would seriously limit their future sales as few people will buy from a company that would abandon past customers like that.
I actually would be more worried about buying an Entourage since it had a limited production run and thus even salvage yards won't be a good source for parts. I nearly bought one a year ago as the local dealer had some killer prices on the last 4 on his lot. Fortunately, I found out that the model was being discontinued and that is a key reason I decided to wait a while longer.
I may look at the crossovers a little longer, but frankly none of them much appeal to me.
Matt