spam isn't working yet... Check out the release notes for beta2 (I'm guessing beta2 is what you downloaded?). Also, postgres-pgtcl should only be loaded with Postgres 6.5, it won't help you with Postgres 7.0.
Remember, ACS/pg is still under development (and the next version will be much much better), so your best bet is to make sure to read up on the bboards and check what's being worked on :)
