It's interesting that almost all of the functionality of Brasero could already be had from Nautilus (to burn data CDs and images), Rhythmbox (to burn audio CDs) and Totem (using the VCD/DVD burner plugin). Burning a CD from the media's application always made more sense to me.
On another note, Rhythmbox will see a 0.12 release, after which active development will cease, Jonathan Matthew feeling that the code base is too much of a dead end. This doesn't mean that it will be replaced as the default music application anytime soon, but the news could cause some distros to move toward Banshee or Exaile. There was much gnashing of teeth over at the Ubuntu Forums.