See if your local grocery store can make you a cold-cuts tray, or a prepared fruit tray, for you (or any guest who asks if they can help you with anything!) to pick up on the morning of. Put the cold-cuts and cheeses together with croissants from the store's bakery. (If you have the dishes, there's no reason you can't re-plate the fruit and cold-cuts for a more elegant look.) Or, if you don't want to have to go out, grapes and strawberries can be washed ahead of time. Pineapples can be cut ahead of time, though I would personally wait on melons.
If you want to go home-made, muffins will keep well for two days, and I personally think that muffins are better home-made, anyway.
Also, maybe try an egg casserole. You could pre-cook the sausage on Friday, and add it to your egg mixture on Sunday morning. I have never made one myself, so I can't speak for which recipes are the best, but it's a standby for several of my friends' brunches. This one from allrecipes.com seems to be pretty quick:
http://allrecipes.com/recipe/egg-casserole/
Congratulations to your daughter, and to your family!