I must admit, I certainly wasn't expecting to hear such a positive report on the weekend. Just shows why you must Act As if things will go well - because sometimes they actually do!!!
Now remember the following - this is a bit like trying to get a wild animal to eat out of your hand - slowly, slowly, no sudden moves to scare him off. Expect a step backward or two after he has allowed himself to get a little closer this weekend.
I think requesting that he email you the project is a good idea, and a good validating way to follow up the weekend without appearing pursuing. I think I'd hold off on the present for now - you bought him BD presents, he liked them, don't stretch your budget to go overboard.
As for the memory loss - it is a characteristic of depression, and most WASs are afflicted with it. Amazing, isn't it? Just drives home how really sick most of them are - they really just are not right in the brain when they are in this.