Davis Pyon has made a MaxMSP external for accessing Csound5 in Max according to the Csound5 API. The external was first named cmp.csound~ but he has now inherited the csound~ name previous used by Matt Ingals for his external accessing Csound4. The new csound~ external can be found here.
csound~: Csound5 as Max external
March 22, 2006