You would get a very nice laying chicken, usually referred to as a barnyard mix. The cross breeds wouldn't "be" anything, not like a sex-link. You'd probably get a great variety of colors, that's a big reason many of us like to mix breeds.
A quick Google search says that White Leghorns are a dominate white genes without silver genes so that wouldn't result in a sexlink. For people interested in the genetics of sexlinks take a look at the Sex- linked Information topic
I'm not trying to breed anything special. I was just curious to find out what the chicks will look like. I have 20 eggs in the bater and due to hatch on Halloween. Thanks Lensters for the link which I will be saving.