We've done salsa in the freezer burritos - not a lot of salsa but enough for a kick.
My standard is eggs, cheddar, crumbled sausage. I've also done eggs, bacon, and cheese, but the bacon doesn't freeze and reheat as well. We vary the cheese and sometimes omit the sausage.
At first I would cook everything up and then layer the fillings in the burrito. But I found it's easier and quicker to cook everything up, and then mix the eggs, shredded cheese and sausage in one large bowl. Spoon that into the burritos.
For freezing, I wrap in plastic wrap and store in a larger (2 gallon) plastic bag. When reheating in the microwave for 2 minutes, I wrap in a paper towel (at work), or place under a dishtowel/napkin. This keeps the burrito from drying out.
Bridget. Momma to DD (4), expecting DS - 9/09, wife to SAHD. Gardener, coffee addict, urban dweller.