Fellow Irregular Dion Hinchcliffe writes about Enterprise Mashups - great read.
But balance that against the comment Dave Watson (he is CTO at Kaiser Permanente where he has all kinds of integration issues amd technologies) recently left on my SAP-Ora-fic post:
"As the big players, like SAP and Oracle, continue to acquire other companies they bleed off any innovative energy from their own efforts and from those they acquire. They make an unfortunate swap of integration for innovation."
So, I am thinking - may be IBM, Oracle, Infor - all the big acquirers should first try out any new integration technology on themselves before they unleash even more integration products on their consumers.
When I look at all the magical integration tools SAP alone has delivered to its customer base over the last decade - ALE, EDI, IDoc, RFC, BAPI, DCOM, Java Connector, ESA - I have a hard time believing any new integration technology - even using contemporary terms like mashup - is truly innovation.