Sounds awesome! I think my only concern is you guys becoming too dependent on some of AWS's proprietary features, although I'm sure you've considered everything before making the move. When I joined this site, I thought it wouldnt have a lot of growth, seeing as it is a niche inside a niche, but I was pleasantly surprised when I saw news of 250000 users within months of 200k. For that kind of growth, good infrastructure is doubly important, so I wish you luck in maintaining and developing the site!