I'm probably the most green person on this site and for the world of cake decorating so please take that into consideration...I know you have to put a layer of buttercream between the crumb coat and fondant but could you use cream cheese frosting instead? I love cream cheese frosting so I'm hoping you'll say it will be just fine. But maybe I just need to give buttercream a try. Sometimes it can taste to commericalized. Know what I mean? But, probably just me.
Yeah I'm sure that would work just fine. The only thing I found with cream cheese icing is that it is soft and doesn't hold up as well as buttercream for decorating, smoothing,etc... I don't see why you couldn't use it for your crumb coat though.
I've not done it, but I wouldn't hesitate....I see no reason why you couldn't.
I just made one with cream cheese frosting under the fondant! Worked great! 
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