http://linas.org/linux/corba.html: Linux CORBA Reference and Evaluation--excellent Linux-specific site
http://www.omg.org/: OMG Home Site
http://adams.patriot.net/~tvalesky/freecorba.html: Free CORBA page
http://www.ooc.com/ob.html: OmniBroker ORB (C++/Java)
http://diamant-atm.vsb.cs.uni-frankfurt.de/~mico/: MICO Orb
http://www.cerfnet.com/~mpcline/Corba-FAQ/: Freqently Asked Questions
http://www.acl.lanl.gov/CORBA/: CORBA and OMG Info Resources
ftp://ftp.omg.org/pub/docs/ab/97-05-05.pdf: OMA Guide (useful for definitions and terms--in Adobe Acrobat format)
RFC 1831: RPC: Remote Procedure Call Protocol Specification Version 2
RFC 1832: XDR: External Data Representation Standard
RFC 1833: Binding Protocols for ONC RPC Version 2
The RFCs are available at http://sunsite.doc.ic.ac.uk/packages/rfc/ (United Kingdom), ftp://ftp.funet.fi/rfc/ (Finland) and http://www.ietf.org/ (USA).