Joel Oleson has posted some of the data on Protocols, Ports and Firewall Rules that were mentioned at the TehcReady4 (internal technical readiness field event in Seattle).
Here are some of the topics:
* Remote Procedure Call Protocol
* DCOM over RPC
* FP-RPC (CAML)
* Stssync Protocol (Drag and Drop in Outlook Calendars with SharePoint Events List)
* URL Protocol (HTTP/S GET)
* XML, Classes and Web Services (including Web Controls and WSRP Web Service), Really Simple Syndication (RSS) & Simple Object Access Protocol (SOAP) API and Document HTML Transformation/Conversion Services
You can find this article here.