WitAdmin application is so uncomfortable because is run with command line.
So I create simple application WitAdminUI.
You can use this on Team Foundation Server2010. Some functions are operated on 2008.
It contains below functions and so simple UI not designed.

work item type
destroy, export ,import ,rename

work item
destroywi(s)

field
change ,delete ,index

link
delete ,export ,import ,deactivate ,reactivate

globallist
edit ,export ,import

category
export , import