Oooh, those biscotti sound very intriguing. I've seen a few recipes for various dried fruit biscotti, maybe I'll try some of those, too.

The chocolate biscotti recipe is here:
http://allrecipes.com/recipe/double-chocolate-biscotti/

And the almond one, here:
http://allrecipes.com/recipe/chocolate-nut-biscotti/
I use a cup of slivered almonds instead of hazelnuts, and almond extract instead vanilla. And I just use regular semisweet chocolate for the dip. I love the texture of these, they're actually quite delicate for a biscotti.

Have fun!