I love Rhonda's Ultimate Marshmallow Fondant.It is in the recipe section here on cc .It is pretty simple to make but she adds a few ingredients to tame down the sweet a bit.A lot of people on this site reccomend Michelle Fosters Fondant it is called mff but I haven't tried it just simply because with you have to mix part of it with your stand mixer and I'm to lazy to clean mine and with Rhonda's you don't use it.It is really easy to use.The only trouble I have with Rhonda's is keepimg my 3 year old out of it!
I'm new to fondant as well, but I've had success with the MMF (marshmallow fondant) recipe from the recipe section here. The keys are to grease both the bowl you use to melt the marshmallows, the mixer bowl and your hands when you start working with it. I've tried it with both "name brand" marshmallows and generic...worked great both times.
It will give your KA mixer a good workout though. 
I agree with the previous poster...the hardest part is keeping my kids out of it! They all hang around the table waiting for fondant scraps.
Michele Foster's Recipe (aka MFF) is great, especially when you add white chocolate to it.
Here's the recipe:
http://cakecentral.com/cake_recipe-7446-1-Michele-Fosters-Fondant.html
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