Are you speaking of a specific brush by the name of "fuzzball"? Surely you're not referring to the soft-round brush that's pretty much the default? If the latter, check to see that you're using the Brush Tool, not the Pencil Tool.
Looks like R_Kelly nailed the answer. Somehow I hadn't noticed that one before, nor that it had been removed.
I did know that the 5 pointed star had been removed. Seems odd that Adobe would drop brushes, rather than just add to the list.
If it can be helpful, here's a preset that contains both the star and the fuzzball, saved from Photoshop CS5...