Today, I switched over to FeedBlitz, which I'm told is substantially better. The formatting on the emailed posts should be much prettier, and the service much more reliable.
Those of you who were already subscribed with the old system don't need to do anything: I already migrated your subscriptions over to the new system. Those of you who weren't subscribed might want to give it a try. Takes two minutes.
Just enter your email, then follow the directions on the screen: