One of the things we were most worried about was how Andrew and Edward would handle one another. Mostly this was due to Andrew's autism and the fact that he absolutely hates crying. Since one of the primary things a baby does is cry, we were worried. They, however, seem to be doing pretty well together.
Andrew comments when Edward cries, but he doesn't seem to be too worried about it. We did, however, have a few strange moments. Andrew kept taking Edward's hands and moving them away from his face. He seemed extremely persistent about this. We told him Edward was ok, but it didn't make him happy.
One of us finally asked what was wrong, and Andrew told us "Don't bite your fingers!" Apparently he was just being protective and didn't want Edward to take a bite out of his fingers. :)
Here's a picture of Andrew making sure Edward doesn't bit his fingers. :)