I was just wondering when life/schedules got more predictable?  Our boys are 3 months old (a little less than 2 adjusted).  already things are easier than they used to be...but it seems like as soon as I feel like they might be setting a schedule - it changes!  Also, when did your multiples start to notice/interact with each other?                
                             
        
Re: 2 ?'s
I'm a huge schedule girl, so I found it very frustrating that their schedule was always changing. It seemed like as soon as I got a solid schedule down, they would change their ways! I don't think we really got into a good pattern until 10 months or so (maybe more). The first year just seemed like a blur and nothing was set in stone. After the first year, we were able to maintain a little more of a set schedule. At 16 months, we've got it down pat!
As far as when they started interacting, it's hard to say. It's a slow process, so I don't really remember "when." They started looking at each other around 5 or 6 months, maybe. I feel like anytime before that, it was like they didn't even notice another baby was next to them! Maybe because that baby has always been there, so they don't even realize it! Of course, once they started sitting up, they would reach out to each other a little bit, and by the time they were crawling, they would follow each other. But...I really feel like once they started walking around is when they really started playing, fighting, and talking to each other. Before that seemed like random interaction, and now it's actual, real, purposeful interaction. I don't even think that makes sense, but I tried!
Around 3 months we were in a set routine, then it changed when we started solids at 6 months and got a new sleep schedule, then it changed again around 8 months and went to 2 naps only. Then around 10 months we had a regular breakfast, lunch, dinner schedule with 2 naps. That routine stayed until 16 months when we went to 1 nap, and we've been on the same routine since. I mean... as they grow up it will just keep changing! It's not really a matter of waiting for the change to stop, it just keeps growing. I think it's more a matter of getting used to everything changing.
As far as noticing/interracting, I'm really drawing a blank. I thought around 3ish months they would smile, etc... at each other. But the interacting was later.