Here's a fun website - aout 50 different chocolate recipes to pick from!
http://www.williams-sonoma.com/recipe/cRecipe.cfm?objectId=74F48278-906A-4CF6-BCD23AC80C9CAC1C&sub=4
Also, if you do a chocolate cake - try decorating with powdered sugar, it looks really good against the dark chocolate color. Use a template or a cookie cutter, and make a design - my favorite is snowflakes! For this one, cut the template out of tracing paper or wax paper with an exacto knife, and sprinkle the sugar gently over the template. Don't worry about getting it perfect - it's still really pretty with soft edges!