ewww Tim.
I didn't know about you planning to apply for this work, I thought you were on something along the lines of bug #167.
It happens that I was also willing to work on that category renaming feature, even if only brion, Simetrical and VasilieVVV knew about it.
My application / project idea description is here : http://en.wikipedia.org/wiki/User:NicDumZ/GSoC_2008