single setUp/tearDown per suite/group?

The current examples I can find only show how to do a setup/teardown per test. Is it possible to:

1) run a single test harness/suite setup/tear down
2) barring that:
a) get some hook into nodeunit to know how many tests are to be run (ie, if a -t option was used)
b) get some notification when all the test.done() are called to write a custom "done" hook