You want DHCP with DDNS? Well, ya got it.
So far the fruits of the summer include:
calypso-client: registers a Linux client with the Calypso server
dhcp-installer: setups a calypso client server with DHCP with dynamic updating to PowerDNS with an LDAP backend.

Next up: Mail. Then I can move my network over to Calypso native 🙂