At least there still is default application selector (though hidden in very inappropriate place, why "system info"?), but seems that xml definitions in /usr/share/gnome-control-center/default-apps/ that worked for Gnome2 are ignored now. What I am trying to do is make Outlook my default email and calendar program.
UPDATE: I just mean that: Outlook (not some Outlook-alike program). It runs reasonably well under Crossover, so please don't ask me to use Evolution, I tried and it was real pain.