Any suggestions for a good white cake/cupcake recipe? I've tried the Swiss White Chocolate recipe for a regular cake, but think it's a little too dense. I plan on filling the cupcakes with strawberry mascarpone cheese, so I want something a little lighter.

I'm also looking for a good white frosting. Something not too sweet and on the fluffy side...but that will hold up since I'll be serving them at a party.

Your cupcakes sound yummy.
It may be too late for this time, but there are some great recipes in the recipe section here, with reviews and all. Frostings too.

Also, if you have The Cake Bible, the White Velvet Cake is to die for.