This is something on the horizon that I am excited about. Since Nevergrind is actually making some decent money, I am considering re-investing by upgrading to a dedicated host. This costs more money, but really opens up my options in terms of what I can and cannot do. One key example that comes to mind is installing something like
Ratchet to allow for server-side events using websockets. Using schedule events (crontab) is another biggie. And plus I'd have command line/root access. All goodies I'd love to have. It would remove any concerns about database size, too, since I wouldn't even need to rely on phpmyadmin anymore.
That's all. Just wanted to mention it.