The key announcement from ChrisCap's keynote at TechEd yesterday was LoBI - Line of Business Interoperability. This is a toolkit for Office and SharePoint 2007 that will simplify integration with backend systems. For those familiar with IBF (Information Bridge Framework) this represents the natural evolution of work the IBF team started. I gather that there will be a migration path available for those organisations that have developed solutions based on IBF. A Beta version of LoBI should be available later this year.
More info in the CNET report: http://news.com.com/Microsoft+pretties+Office+for+business+apps/2100-1012_3-6082718.html?tag=nl